-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcron-syntax.html
More file actions
60 lines (58 loc) · 26.7 KB
/
cron-syntax.html
File metadata and controls
60 lines (58 loc) · 26.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
<!DOCTYPE html>
<html lang="en-US" dir="ltr">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Cron Syntax | node-cron</title>
<meta name="description" content="A Lightweight Task Scheduler for Node.js">
<meta name="generator" content="VitePress v1.6.3">
<link rel="preload stylesheet" href="/assets/style.DoF0VTmy.css" as="style">
<link rel="preload stylesheet" href="/vp-icons.css" as="style">
<script type="module" src="/assets/app.Yv9tMCdR.js"></script>
<link rel="preload" href="/assets/inter-roman-latin.Di8DUHzh.woff2" as="font" type="font/woff2" crossorigin="">
<link rel="modulepreload" href="/assets/chunks/theme.CDm2W-g2.js">
<link rel="modulepreload" href="/assets/chunks/framework.Dh1jimFm.js">
<link rel="modulepreload" href="/assets/cron-syntax.md.zdOzM6TB.lean.js">
<script async src="https://www.googletagmanager.com/gtag/js?id=G-M6MDH0HR0C"></script>
<script>window.dataLayer=window.dataLayer||[];function gtag(){dataLayer.push(arguments)}gtag("js",new Date),gtag("config","G-M6MDH0HR0C");</script>
<script id="check-dark-mode">(()=>{const e=localStorage.getItem("vitepress-theme-appearance")||"auto",a=window.matchMedia("(prefers-color-scheme: dark)").matches;(!e||e==="auto"?a:e==="dark")&&document.documentElement.classList.add("dark")})();</script>
<script id="check-mac-os">document.documentElement.classList.toggle("mac",/Mac|iPhone|iPod|iPad/i.test(navigator.platform));</script>
</head>
<body>
<div id="app"><div class="Layout" data-v-5d98c3a5><!--[--><!--]--><!--[--><span tabindex="-1" data-v-0b0ada53></span><a href="#VPContent" class="VPSkipLink visually-hidden" data-v-0b0ada53>Skip to content</a><!--]--><!----><header class="VPNav" data-v-5d98c3a5 data-v-ae24b3ad><div class="VPNavBar" data-v-ae24b3ad data-v-6aa21345><div class="wrapper" data-v-6aa21345><div class="container" data-v-6aa21345><div class="title" data-v-6aa21345><div class="VPNavBarTitle has-sidebar" data-v-6aa21345 data-v-1168a8e4><a class="title" href="/" data-v-1168a8e4><!--[--><!--]--><!----><span data-v-1168a8e4>node-cron</span><!--[--><!--]--></a></div></div><div class="content" data-v-6aa21345><div class="content-body" data-v-6aa21345><!--[--><!--]--><div class="VPNavBarSearch search" data-v-6aa21345><!----></div><nav aria-labelledby="main-nav-aria-label" class="VPNavBarMenu menu" data-v-6aa21345 data-v-dc692963><span id="main-nav-aria-label" class="visually-hidden" data-v-dc692963> Main Navigation </span><!--[--><!--[--><a class="VPLink link VPNavBarMenuLink" href="/" tabindex="0" data-v-dc692963 data-v-e56f3d57><!--[--><span data-v-e56f3d57>Home</span><!--]--></a><!--]--><!--[--><a class="VPLink link VPNavBarMenuLink" href="/getting-started.html" tabindex="0" data-v-dc692963 data-v-e56f3d57><!--[--><span data-v-e56f3d57>Documentation</span><!--]--></a><!--]--><!--]--></nav><!----><div class="VPNavBarAppearance appearance" data-v-6aa21345 data-v-6c893767><button class="VPSwitch VPSwitchAppearance" type="button" role="switch" title aria-checked="false" data-v-6c893767 data-v-5337faa4 data-v-1d5665e3><span class="check" data-v-1d5665e3><span class="icon" data-v-1d5665e3><!--[--><span class="vpi-sun sun" data-v-5337faa4></span><span class="vpi-moon moon" data-v-5337faa4></span><!--]--></span></span></button></div><div class="VPSocialLinks VPNavBarSocialLinks social-links" data-v-6aa21345 data-v-0394ad82 data-v-7bc22406><!--[--><a class="VPSocialLink no-icon" href="https://www.npmjs.com/package/node-cron" aria-label="npm" target="_blank" rel="noopener" data-v-7bc22406 data-v-bd121fe5><span class="vpi-social-npm"></span></a><a class="VPSocialLink no-icon" href="https://github.com/node-cron/node-cron" aria-label="github" target="_blank" rel="noopener" data-v-7bc22406 data-v-bd121fe5><span class="vpi-social-github"></span></a><!--]--></div><div class="VPFlyout VPNavBarExtra extra" data-v-6aa21345 data-v-bb2aa2f0 data-v-cf11d7a2><button type="button" class="button" aria-haspopup="true" aria-expanded="false" aria-label="extra navigation" data-v-cf11d7a2><span class="vpi-more-horizontal icon" data-v-cf11d7a2></span></button><div class="menu" data-v-cf11d7a2><div class="VPMenu" data-v-cf11d7a2 data-v-b98bc113><!----><!--[--><!--[--><!----><div class="group" data-v-bb2aa2f0><div class="item appearance" data-v-bb2aa2f0><p class="label" data-v-bb2aa2f0>Appearance</p><div class="appearance-action" data-v-bb2aa2f0><button class="VPSwitch VPSwitchAppearance" type="button" role="switch" title aria-checked="false" data-v-bb2aa2f0 data-v-5337faa4 data-v-1d5665e3><span class="check" data-v-1d5665e3><span class="icon" data-v-1d5665e3><!--[--><span class="vpi-sun sun" data-v-5337faa4></span><span class="vpi-moon moon" data-v-5337faa4></span><!--]--></span></span></button></div></div></div><div class="group" data-v-bb2aa2f0><div class="item social-links" data-v-bb2aa2f0><div class="VPSocialLinks social-links-list" data-v-bb2aa2f0 data-v-7bc22406><!--[--><a class="VPSocialLink no-icon" href="https://www.npmjs.com/package/node-cron" aria-label="npm" target="_blank" rel="noopener" data-v-7bc22406 data-v-bd121fe5><span class="vpi-social-npm"></span></a><a class="VPSocialLink no-icon" href="https://github.com/node-cron/node-cron" aria-label="github" target="_blank" rel="noopener" data-v-7bc22406 data-v-bd121fe5><span class="vpi-social-github"></span></a><!--]--></div></div></div><!--]--><!--]--></div></div></div><!--[--><!--]--><button type="button" class="VPNavBarHamburger hamburger" aria-label="mobile navigation" aria-expanded="false" aria-controls="VPNavScreen" data-v-6aa21345 data-v-e5dd9c1c><span class="container" data-v-e5dd9c1c><span class="top" data-v-e5dd9c1c></span><span class="middle" data-v-e5dd9c1c></span><span class="bottom" data-v-e5dd9c1c></span></span></button></div></div></div></div><div class="divider" data-v-6aa21345><div class="divider-line" data-v-6aa21345></div></div></div><!----></header><div class="VPLocalNav has-sidebar empty" data-v-5d98c3a5 data-v-a6f0e41e><div class="container" data-v-a6f0e41e><button class="menu" aria-expanded="false" aria-controls="VPSidebarNav" data-v-a6f0e41e><span class="vpi-align-left menu-icon" data-v-a6f0e41e></span><span class="menu-text" data-v-a6f0e41e>Menu</span></button><div class="VPLocalNavOutlineDropdown" style="--vp-vh:0px;" data-v-a6f0e41e data-v-8a42e2b4><button data-v-8a42e2b4>Return to top</button><!----></div></div></div><aside class="VPSidebar" data-v-5d98c3a5 data-v-319d5ca6><div class="curtain" data-v-319d5ca6></div><nav class="nav" id="VPSidebarNav" aria-labelledby="sidebar-aria-label" tabindex="-1" data-v-319d5ca6><span class="visually-hidden" id="sidebar-aria-label" data-v-319d5ca6> Sidebar Navigation </span><!--[--><!--]--><!--[--><div class="no-transition group" data-v-c40bc020><section class="VPSidebarItem level-0 has-active" data-v-c40bc020 data-v-b3fd67f8><!----><div class="items" data-v-b3fd67f8><!--[--><div class="VPSidebarItem level-1 is-link" data-v-b3fd67f8 data-v-b3fd67f8><div class="item" data-v-b3fd67f8><div class="indicator" data-v-b3fd67f8></div><a class="VPLink link link" href="/getting-started.html" data-v-b3fd67f8><!--[--><p class="text" data-v-b3fd67f8>Getting Started</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-b3fd67f8 data-v-b3fd67f8><div class="item" data-v-b3fd67f8><div class="indicator" data-v-b3fd67f8></div><a class="VPLink link link" href="/cron-syntax.html" data-v-b3fd67f8><!--[--><p class="text" data-v-b3fd67f8>Cron Syntax</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-b3fd67f8 data-v-b3fd67f8><div class="item" data-v-b3fd67f8><div class="indicator" data-v-b3fd67f8></div><a class="VPLink link link" href="/api-reference.html" data-v-b3fd67f8><!--[--><p class="text" data-v-b3fd67f8>Node-Cron Module</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-b3fd67f8 data-v-b3fd67f8><div class="item" data-v-b3fd67f8><div class="indicator" data-v-b3fd67f8></div><a class="VPLink link link" href="/scheduling-options.html" data-v-b3fd67f8><!--[--><p class="text" data-v-b3fd67f8>Scheduling Options</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-b3fd67f8 data-v-b3fd67f8><div class="item" data-v-b3fd67f8><div class="indicator" data-v-b3fd67f8></div><a class="VPLink link link" href="/task-controls.html" data-v-b3fd67f8><!--[--><p class="text" data-v-b3fd67f8>Task Controls</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-b3fd67f8 data-v-b3fd67f8><div class="item" data-v-b3fd67f8><div class="indicator" data-v-b3fd67f8></div><a class="VPLink link link" href="/event-listening.html" data-v-b3fd67f8><!--[--><p class="text" data-v-b3fd67f8>Event Listening</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-b3fd67f8 data-v-b3fd67f8><div class="item" data-v-b3fd67f8><div class="indicator" data-v-b3fd67f8></div><a class="VPLink link link" href="/background-tasks.html" data-v-b3fd67f8><!--[--><p class="text" data-v-b3fd67f8>Background Tasks</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-b3fd67f8 data-v-b3fd67f8><div class="item" data-v-b3fd67f8><div class="indicator" data-v-b3fd67f8></div><a class="VPLink link link" href="/migrating-from-v3.html" data-v-b3fd67f8><!--[--><p class="text" data-v-b3fd67f8>Migrationg from V3</p><!--]--></a><!----></div><!----></div><!--]--></div></section></div><!--]--><!--[--><!--]--></nav></aside><div class="VPContent has-sidebar" id="VPContent" data-v-5d98c3a5 data-v-1428d186><div class="VPDoc has-sidebar has-aside" data-v-1428d186 data-v-39a288b8><!--[--><!--]--><div class="container" data-v-39a288b8><div class="aside" data-v-39a288b8><div class="aside-curtain" data-v-39a288b8></div><div class="aside-container" data-v-39a288b8><div class="aside-content" data-v-39a288b8><div class="VPDocAside" data-v-39a288b8 data-v-3f215769><!--[--><!--]--><!--[--><!--]--><nav aria-labelledby="doc-outline-aria-label" class="VPDocAsideOutline" data-v-3f215769 data-v-a5bbad30><div class="content" data-v-a5bbad30><div class="outline-marker" data-v-a5bbad30></div><div aria-level="2" class="outline-title" id="doc-outline-aria-label" role="heading" data-v-a5bbad30>On this page</div><ul class="VPDocOutlineItem root" data-v-a5bbad30 data-v-b933a997><!--[--><!--]--></ul></div></nav><!--[--><!--]--><div class="spacer" data-v-3f215769></div><!--[--><!--]--><!----><!--[--><!--]--><!--[--><!--]--></div></div></div></div><div class="content" data-v-39a288b8><div class="content-container" data-v-39a288b8><!--[--><!--]--><main class="main" data-v-39a288b8><div style="position:relative;" class="vp-doc _cron-syntax" data-v-39a288b8><div><h1 id="cron-syntax" tabindex="-1">Cron Syntax <a class="header-anchor" href="#cron-syntax" aria-label="Permalink to "Cron Syntax""></a></h1><p>The <code>node-cron</code> package uses a standard cron expression format to define when tasks should run. It supports <strong>five or six fields</strong>, though the <strong>first (seconds)</strong> is optional.</p><div class="language-plaintext vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">plaintext</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span># ┌────────────── second (optional)</span></span>
<span class="line"><span># │ ┌──────────── minute</span></span>
<span class="line"><span># │ │ ┌────────── hour</span></span>
<span class="line"><span># │ │ │ ┌──────── day of month</span></span>
<span class="line"><span># │ │ │ │ ┌────── month</span></span>
<span class="line"><span># │ │ │ │ │ ┌──── day of week</span></span>
<span class="line"><span># │ │ │ │ │ │</span></span>
<span class="line"><span># * * * * * *</span></span></code></pre></div><h3 id="allowed-values-per-field" tabindex="-1">Allowed Values Per Field <a class="header-anchor" href="#allowed-values-per-field" aria-label="Permalink to "Allowed Values Per Field""></a></h3><table tabindex="0"><thead><tr><th>Field</th><th>Value</th></tr></thead><tbody><tr><td>second</td><td>0-59 (optional)</td></tr><tr><td>minute</td><td>0-59</td></tr><tr><td>hour</td><td>0-23</td></tr><tr><td>day of month</td><td>1-31</td></tr><tr><td>month</td><td>1-12 (or names, e.g., Jan, Sep)</td></tr><tr><td>day of week</td><td>0-7 (or names, 0 or 7 are Sunday)</td></tr></tbody></table><h3 id="usage-examples" tabindex="-1">Usage Examples <a class="header-anchor" href="#usage-examples" aria-label="Permalink to "Usage Examples""></a></h3><h3 id="_1-using-multiple-values" tabindex="-1">1. Using Multiple Values <a class="header-anchor" href="#_1-using-multiple-values" aria-label="Permalink to "1. Using Multiple Values""></a></h3><p>You can define multiple specific values using commas. This allows you to run a task at more than one time in a field.</p><div class="language-javascript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">import</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> cron </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">from</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> 'node-cron'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Runs at minutes 1, 2, 4, and 5 of every hour</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">cron.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">schedule</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'1,2,4,5 * * * *'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=></span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> console.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'Running at minutes 1, 2, 4, and 5 of each hour'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">});</span></span></code></pre></div><blockquote><p><strong>Explanation</strong>: The first field (<code>minute</code>) is set to <code>1,2,4,5</code>, which means the task runs at those specific minutes past every hour.<br><strong>Important</strong>: This expression has only 5 fields, so the <strong><code>second</code></strong> field is omitted. In <code>node-cron</code>, when the seconds field is not provided, it defaults to <code>0</code>.</p></blockquote><h3 id="_2-using-ranges" tabindex="-1">2. Using Ranges <a class="header-anchor" href="#_2-using-ranges" aria-label="Permalink to "2. Using Ranges""></a></h3><p>You can define a range using a dash (<code>-</code>) to specify a continuous interval.</p><div class="language-javascript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">import</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> cron </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">from</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> 'node-cron'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Runs every minute from minute 1 to minute 5 (inclusive) of every hour</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">cron.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">schedule</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'1-5 * * * *'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=></span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> console.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'Running every minute from 1 to 5'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">});e.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'running every minute to 1 from 5'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span></code></pre></div><blockquote><p><strong>Explanation</strong>: This is equivalent to writing <code>1,2,3,4,5</code>. It's a cleaner way to express consecutive values.</p></blockquote><h3 id="_3-using-step-values" tabindex="-1">3. Using Step Values <a class="header-anchor" href="#_3-using-step-values" aria-label="Permalink to "3. Using Step Values""></a></h3><p>Steps are defined using a slash (<code>/</code>) after a range or a wildcard. This allows you to define periodic intervals.</p><div class="language-javascript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">javascript</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Runs every 2 minutes (even minutes: 0, 2, 4, ...)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">cron.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">schedule</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'*/2 * * * *'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=></span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> console.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'Running every 2 minutes (even minutes)'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">});</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Runs every odd minute (1, 3, 5, ..., 59)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">cron.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">schedule</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'1-59/2 * * * *'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=></span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> console.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'Running every 2 minutes starting from 1 (odd minutes)'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">});</span></span></code></pre></div><blockquote><p><strong>Explanation</strong>:</p><ul><li><p><code>*/2</code> means “every 2 units”, respecting the available values, e.g: minutes <code>0-59</code>. In this case, it means "every 2 minutes from 0 to 59, covering all even minutes.</p></li><li><p><code>1-59/2</code> means “every 2 units starting from 1”, covering all odd minutes.</p></li></ul></blockquote><h3 id="_4-using-month-and-weekday-names" tabindex="-1">4. Using Month and Weekday Names <a class="header-anchor" href="#_4-using-month-and-weekday-names" aria-label="Permalink to "4. Using Month and Weekday Names""></a></h3><p>For better readability, <code>node-cron</code> lets you use names (full or abbreviated) instead of numbers for months and days of the week.</p><div class="language-js vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">js</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Runs every minute on Sundays in January and September</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">cron.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">schedule</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'* * * January,September Sunday'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=></span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> console.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'Running on Sundays in January and September'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">});</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Same schedule using short names</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">cron.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">schedule</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'* * * Jan,Sep Sun'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, () </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=></span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> console.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">'Running on Sundays in Jan and Sep'</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">});</span></span></code></pre></div><blockquote><p><strong>Explanation</strong>: Names can improve readability, especially when dealing with specific months or days.</p></blockquote></div></div></main><footer class="VPDocFooter" data-v-39a288b8 data-v-e257564d><!--[--><!--]--><!----><nav class="prev-next" aria-labelledby="doc-footer-aria-label" data-v-e257564d><span class="visually-hidden" id="doc-footer-aria-label" data-v-e257564d>Pager</span><div class="pager" data-v-e257564d><a class="VPLink link pager-link prev" href="/getting-started.html" data-v-e257564d><!--[--><span class="desc" data-v-e257564d>Previous page</span><span class="title" data-v-e257564d>Getting Started</span><!--]--></a></div><div class="pager" data-v-e257564d><a class="VPLink link pager-link next" href="/api-reference.html" data-v-e257564d><!--[--><span class="desc" data-v-e257564d>Next page</span><span class="title" data-v-e257564d>Node-Cron Module</span><!--]--></a></div></nav></footer><!--[--><!--]--></div></div></div><!--[--><!--]--></div></div><footer class="VPFooter has-sidebar" data-v-5d98c3a5 data-v-e315a0ad><div class="container" data-v-e315a0ad><p class="message" data-v-e315a0ad>Released in 2016 under the ISC License.</p><p class="copyright" data-v-e315a0ad>Made with 💚 by @merencia</p></div></footer><!--[--><!--]--></div></div>
<script>window.__VP_HASH_MAP__=JSON.parse("{\"api-reference.md\":\"C8XTBCxt\",\"background-tasks.md\":\"CvrHbuHl\",\"cron-syntax.md\":\"zdOzM6TB\",\"event-listening.md\":\"CWZHYZCV\",\"getting-started.md\":\"n-fZ26et\",\"index.md\":\"B9L37Htx\",\"migrating-from-v3.md\":\"CBFeLuJC\",\"scheduling-options.md\":\"DZwo2gQd\",\"task-controls.md\":\"BZ0nkGHi\"}");window.__VP_SITE_DATA__=JSON.parse("{\"lang\":\"en-US\",\"dir\":\"ltr\",\"title\":\"node-cron\",\"description\":\"A Lightweight Task Scheduler for Node.js\",\"base\":\"/\",\"head\":[],\"router\":{\"prefetchLinks\":true},\"appearance\":true,\"themeConfig\":{\"nav\":[{\"text\":\"Home\",\"link\":\"/\"},{\"text\":\"Documentation\",\"link\":\"/getting-started\"}],\"sidebar\":[{\"items\":[{\"text\":\"Getting Started\",\"link\":\"/getting-started\"},{\"text\":\"Cron Syntax\",\"link\":\"/cron-syntax\"},{\"text\":\"Node-Cron Module\",\"link\":\"/api-reference\"},{\"text\":\"Scheduling Options\",\"link\":\"/scheduling-options\"},{\"text\":\"Task Controls\",\"link\":\"/task-controls\"},{\"text\":\"Event Listening\",\"link\":\"/event-listening\"},{\"text\":\"Background Tasks\",\"link\":\"/background-tasks\"},{\"text\":\"Migrationg from V3\",\"link\":\"/migrating-from-v3\"}]}],\"socialLinks\":[{\"icon\":\"npm\",\"link\":\"https://www.npmjs.com/package/node-cron\"},{\"icon\":\"github\",\"link\":\"https://github.com/node-cron/node-cron\"}],\"footer\":{\"message\":\"Released in 2016 under the ISC License.\",\"copyright\":\"Made with 💚 by @merencia\"}},\"locales\":{},\"scrollOffset\":134,\"cleanUrls\":false}");</script>
</body>
</html>