[DatePicker] Incorrect TimeZones

Description:

There seems to be some strange behavior with time zones with the new date picker I am in New Zealand so our time zone is currently UTC+13 and was testing around 9am

As shown below, it is displaying yesterday as today (I increased the valid date range to include yesterday as it is hidden if not in the range)

Also when setting the initially selected date via MaterialDatePicker.Builder.datePicker().setSelection(), if the millis for a specific UTC date/time is given, it is not accounting for the time zone offset and is selecting the day prior. Currently our workaround is to manually add the millisecond difference from UTC to local time.

Android API version:

Min 27, Target/compile 29

Material Library version:

1.1.0-rc01

Device:

Zebra TC51

[Hesamedin]

I am using 1.3.0-alpha01 and have the same problem.

So, this is my workaround.

val picker = MaterialDatePicker.Builder.datePicker()
            .....
            .build()
picker.show(supportFragmentManager, picker.toString())
picker.addOnPositiveButtonClickListener {
            val utcTime = Date(it)
            val format = "yyy/MM/dd HH:mm:ss"
            val sdf = SimpleDateFormat(format, Locale.getDefault())
            sdf.timeZone = TimeZone.getTimeZone("UTC")
            val gmtTime = SimpleDateFormat(format, Locale.getDefault()).parse(sdf.format(utcTime))
            gmtTime?.let {  date ->
                vm.setNextDueDate(date.time)
            }
}

[danielandujar]

Feb 2022, This issue is still happening in 1.5.0