Description:
------------
The script below lists all of the timezones affected with the following conditions:

1. Timezone using DST
2. Date constructed 1 second before transition to standard time
3. Date is not in DST

For example, if a timezone moves back to 2AM at 3AM, a date constructed at 2:59:59AM DST. Adding a second should move it back to 2AM standard time. What I'm seeing is all of the timezones with positive offsets are getting constructed in standard time and most (except for one) of the timezones with negative offsets are getting constructed in DST.

Test script:
---------------
https://3v4l.org/vslF6

Expected result:
----------------
All dates behave the same way with respect to DST.