Disable dates that are in backend

[abdulkadhir]

how to disable the set of days that are on the backend.
my JSON format is

`[

"2018-01-06",
"2018-01-07",
"2018-01-13",
"2018-01-14",
"2018-01-21",
]`

[trik]

at the moment you can't disable selection on dates