Support custom timezone

[SaraPrager]

Thanks for this helpful library!

It would be nice to add support for custom timezone.

My use case as an example:
I have a UI for monitoring a remote device.
Sometimes the user wants to see the events in the timezone of the device location, which is not his local timezone.

Thanks.

BTW, there is a typo in the source code:
getDayOfWeekNames return range(0, 6).map((month) => format(setDay(date, month), formatStr, { locale: this._dateFnsLocale, }) );
should rename 'month' to 'day'

[sapozhnikovay]

Hello, Sara,

Thanks for the typo alert ) Should definitely check the source and the tests now.

About the custom timezone case. Do you use the result dates in a some filtering process? Maybe it is more useful to transform the result from the datepicker to the target timezone further in code chain?
Ex: User selects the date (they are shown in his local timezone) and then the actual filter receives the trasformed value. So a user in a GMT+2 zone selects 03-06-2021T:00:00:00Z+02:00 and in the filter goes a GMT-4 zone this is 02-06-2021T18:00:00Z-04:00

Or maybe you want something like in #6 but not for the UTC only but for the any Timezone?

Or maybe I misunderstood the use case )

[SaraPrager]

Hi,
I mean something like useUTC for any timezone.
I should display the calendar itself in any specific timezone.
Thanks

[sapozhnikovay]

Okay, Sara. I'll try to add this feature along with the bugfixes for the #11 and #12.