PST/PDT to AST/ADT time converter

AST/ADT is 4 hours ahead of PST/PDT. When it is 9:00 AM in PST/PDT, it is 1:00 PM in AST/ADT.

PST/PDT PDT

Friday, October 16, 2026

AST/ADT ADT

Friday, October 16, 2026

PST/PDT
Pacific Standard Time
Fri, Oct 16
PDTUTC-7
AST/ADT
Atlantic Standard Time
Fri, Oct 16
ADTUTC-3+4h
Finding your time zone…
Shared working hours (9:00–18:00)

PST/PDT to AST/ADT conversion table

Every hour of today in PST/PDT and the matching time in AST/ADT. Light rows are typical working hours (9:00–18:00).

PST/PDTAST/ADT
12:00 AM4:00 AM
1:00 AM5:00 AM
2:00 AM6:00 AM
3:00 AM7:00 AM
4:00 AM8:00 AM
5:00 AM9:00 AM
6:00 AM10:00 AM
7:00 AM11:00 AM
8:00 AM12:00 PM
9:00 AM1:00 PM
10:00 AM2:00 PM
11:00 AM3:00 PM
12:00 PM4:00 PM
1:00 PM5:00 PM
2:00 PM6:00 PM
3:00 PM7:00 PM
4:00 PM8:00 PM
5:00 PM9:00 PM
6:00 PM10:00 PM
7:00 PM11:00 PM
8:00 PM12:00 AM+1 day
9:00 PM1:00 AM+1 day
10:00 PM2:00 AM+1 day
11:00 PM3:00 AM+1 day

Best time to call or meet

Both sides are at work from 9:00 AM – 2:00 PM in PST/PDT (1:00 PM – 6:00 PM in AST/ADT).

Daylight saving time and the difference

The difference changes during the year because PST/PDT and AST/ADT switch clocks on different dates:

  • Oct 16, 2026 – Oct 31, 2026: +4h
  • Oct 31, 2026 – Nov 1, 2026: +3h
  • Nov 1, 2026 – Mar 13, 2027: +4h
  • Mar 13, 2027 – Mar 14, 2027: +5h
  • Mar 14, 2027 – Oct 16, 2027: +4h

More conversions

AST to PSTPST to UTCPST to GMTPST to ESTPST to CSTPST to MSTPST to CETPST to MSKPST to GSTPST to PKTPST to ISTPST to SGTPST to PHT
UTC to ASTGMT to ASTEST to ASTCST to ASTMST to ASTCET to ASTMSK to ASTGST to ASTPKT to ASTIST to ASTSGT to ASTPHT to AST

Questions and answers

What is the time difference between PST/PDT and AST/ADT?

AST/ADT is 4 hours ahead of PST/PDT.

What time is it in AST/ADT when it is 9 AM in PST/PDT?

When it is 9:00 AM in PST/PDT, it is 1:00 PM in AST/ADT.

When is the best time to call AST/ADT from PST/PDT?

Both sides are at work from 9:00 AM – 2:00 PM in PST/PDT (1:00 PM – 6:00 PM in AST/ADT).

Does the time difference between PST/PDT and AST/ADT change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.