Different Behavior Regarding Going out Summer Time between Linux and Windows

With the attached program, it is giving different output on Linux and Windows

On Linux

TEST
date =[2019/09/21], time =[22:59:59]
datetime msec =[1569090599000]
datetime toString =[2019/09/21 22:59:59]
datetime toUTC toString =[2019/09/21 18:29:59]
datetime timeZone =[イラン夏時間] (Iran Summer time in English)

So it is still in Summer Time on 22:59:59

On Windows
TEST
date =[2019/09/21], time =[22:59:59]
datetime msec =[1569094199000]
datetime toString =[2019/09/21 22:59:59]
datetime toUTC toString =[2019/09/21 19:29:59]
datetime timeZone =[イラン標準時] (Iran Standard time in English)

So it is out of Summer Time on the same time, and and UTC time becomes 1h ahead

In 5.12 it was the same as now on 5.15 (different behavior on Linux and Windows)
In 5.6 and on Windows it was the same behavior as now in Linux