Docs Date Library
Date Parsing
FullCalendar's API accepts date information in many places, such as when you set the initialDate or define an event's start/end.
Date Objects
FullCalendar's API exposes Date objects in many places such as dateClick or a View object's activeStart/activeEnd.
Duration Object
A duration is a way to express an amount of time that has passed. It can also be used to express a time-of-day, in other words, the amount of time that has passed since the start of the day.
Date Formatting
The term "date formatting" means taking a Date object and converting it into a string. The string can either be a standard string format like ISO8601 (ex: '2018-05-01') or it can be something more custom that you can display to users.
temporal-polyfill
The temporal-polyfill package is now a peer dependency of all the FullCalendar packages. This means you are required to install it.
Util Methods
formatDate
A utility function that formats a date into a string.
formatRange
Formats two dates, a start and an end, into a string. A separator string, most likely a dash, will be intelligently inserted between the two dates.
Calendar::formatDate
A method that formats a date into a string. It inherits the locale and time zone settings of the calendar it's called on.
Calendar::formatIso
Formats a date into an ISO8601 string. Outputs a UTC offset appropriate to the calendar it's called on.
Calendar::formatRange
Formats two dates, a start and an end, into a string. A separator string, most likely a dash, will be intelligently inserted between the two dates. Inherits the time zone and locale settings of the calendar it's called on.
Plugins
Moment Formatting Plugin
FullCalendar's Moment JS connector package lets you use moment formatting strings for all date-formatting settings. The plugin allows you to specify moment formatting strings wherever a date formatting input is expected.
Luxon Formatting Plugin
FullCalendar's Luxon connector package lets you use Luxon formatting strings for all date-formatting settings. The plugin allows you to specify luxon formatting strings wherever a date formatting input is expected.