Clash Royale CLAN TAG#URR8PPP

calendar wrong time after timezone change

I need to get a date 5 month ago from current with the first day of month, I use this code to do it:

val date = Calendar.getInstance()
date.add(Calendar.MONTH, -5)
date.set(Calendar.DAY_OF_MONTH, 1)
date.set(Calendar.HOUR_OF_DAY, 0)
date.set(Calendar.MINUTE, 0)
date.set(Calendar.SECOND, 0)


It normally works fine, making from 2018-08-10T15:46:53+02:00 needed 2018-03-01T00:00:00+01:00

2018-08-10T15:46:53+02:00

2018-03-01T00:00:00+01:00

But if I change timezone to GMT+7, resume app and run this code, it gives me a strange result a few days before needed: 2018-02-28T20:00:00+01:00.

2018-02-28T20:00:00+01:00

If I remove app from memory and start it again after changing timezone, everything works fine.

1 Answer
1

Use library JodaTime then your code will look like this:

DateTime now = DateTime.now();
DateTime fiveMonthsAgo= now.minusMonths(5);


Otherwise, you must manually subtract the year when necessary.

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