What is the time difference between SGT and AST?

AST is 12h 0m behind SGT. SGT is UTC+8 and AST is UTC-4.

Does SGT change for daylight saving time?

SGT is a fixed offset of UTC+8 and does not itself change for daylight saving time.

AST is 12h 0m behind SGT. When it's 12:00 PM SGT, it's 12:00 AM AST.

From

SGT · UTC+8

12:09:53PM

Singapore Time

AST · UTC-4

12:09:53AM

Atlantic Standard Time

9:00 AM SGT=9:00 PM(−1 day) AST

12:00 PM SGT=12:00 AM AST

5:00 PM SGT=5:00 AM AST

Shaded rows are within standard working hours (8am–6pm) on both sides.

What is the time difference between SGT and AST?: AST is 12h 0m behind SGT. SGT is UTC+8 and AST is UTC-4.
What is 12:00 PM SGT in AST?: 12:00 PM SGT is 12:00 AM AST.
Does SGT change for daylight saving time?: SGT is a fixed offset of UTC+8 and does not itself change for daylight saving time.