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DateAlmanac

What is EST in AST?

Atlantic Time is 1 hour ahead

Eastern Time is on UTC−5:00 and Atlantic Time is on UTC−4:00 right now. That gap holds all year, because both zones change their clocks on the same dates.

Convert a time

AST — Atlantic Time

4:00 am

AST, Sat

Time in New York
3:28:33 AM
Time in Halifax
4:28:33 AM
Difference
+1 h
Next clock change
March 14, 2027

Daylight saving

Eastern Time

Sunday, March 14, 2027

Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on EDT after that.

Atlantic Time

Sunday, March 14, 2027

Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ADT after that.

EST to AST conversion table

Every hour of Saturday, November 7, 2026, converted from Eastern Time to Atlantic Time. 1 of the 24 hours fall on a different calendar day in Halifax, which is marked.

12:00 am EST
1:00 am AST
1:00 am EST
2:00 am AST
2:00 am EST
3:00 am AST
3:00 am EST
4:00 am AST
4:00 am EST
5:00 am AST
5:00 am EST
6:00 am AST
6:00 am EST
7:00 am AST
7:00 am EST
8:00 am AST
8:00 am EST
9:00 am AST
9:00 am EST
10:00 am AST
10:00 am EST
11:00 am AST
11:00 am EST
12:00 pm AST
12:00 pm EST
1:00 pm AST
1:00 pm EST
2:00 pm AST
2:00 pm EST
3:00 pm AST
3:00 pm EST
4:00 pm AST
4:00 pm EST
5:00 pm AST
5:00 pm EST
6:00 pm AST
6:00 pm EST
7:00 pm AST
7:00 pm EST
8:00 pm AST
8:00 pm EST
9:00 pm AST
9:00 pm EST
10:00 pm AST
10:00 pm EST
11:00 pm AST
11:00 pm EST
12:00 am AST+1 day

Scheduling between the two

Working hours overlap from 9:00 am to 5:00 pm EST, which is 10:00 am to 6:00 pm AST. Anything inside that window falls in the normal working day at both ends.

A note on AST: it can also mean Arabia Standard Time (UTC+3). This page means Atlantic Time.

Eastern Time (EST) is used in Toronto, Atlanta, Miami, Detroit and most of the US east coast

Atlantic Time (AST) is used in Nova Scotia, New Brunswick and Puerto Rico

Other conversions