This mostly work without problem for past time, but it can be wrong for future time, since timezone/DST may change. When you want 2pm next Sunday, you want 2pm

This mostly work without problem for past time, but it can be wrong for future time, since timezone/DST may change. When you want 2pm next Sunday, you want 2pm next Sunday local time, not whatever 2pm next Sunday is supposed to be as of now.