CRN0

AST to UTC cron converter

UTC is currently 4 hours ahead of AST. Convert UTC to AST

UTC-4
UTC+0
0 13 * * *

At 13:00 every day in UTC.

Show timeline and next runs
Halifax
00061218
00061218
UTC
Each amber mark is a run time. The top strip shows Halifax local time and the bottom strip shows UTC local time, lined up so the same moment sits on the same vertical line. Shaded areas are night hours.

Same moment as “at 09:00 every day” in Halifax.

HalifaxUTC

Examples

ASTUTC
0 9 * * *
0 13 * * *
0 9 * * 1-5
0 13 * * 1-5
*/15 * * * *
*/15 * * * *
0 0 * * *
0 4 * * *
30 2 * * 0
30 6 * * 0
0 0 1 * *
0 4 1 * *
0 */6 * * *
0 4-23/6 * * *
0 17 * * 5
0 21 * * 5
Every hour of the day
0 0 * * *0 4 * * *
0 1 * * *0 5 * * *
0 2 * * *0 6 * * *
0 3 * * *0 7 * * *
0 4 * * *0 8 * * *
0 5 * * *0 9 * * *
0 6 * * *0 10 * * *
0 7 * * *0 11 * * *
0 8 * * *0 12 * * *
0 9 * * *0 13 * * *
0 10 * * *0 14 * * *
0 11 * * *0 15 * * *
0 12 * * *0 16 * * *
0 13 * * *0 17 * * *
0 14 * * *0 18 * * *
0 15 * * *0 19 * * *
0 16 * * *0 20 * * *
0 17 * * *0 21 * * *
0 18 * * *0 22 * * *
0 19 * * *0 23 * * *
0 20 * * *0 0 * * *next day
0 21 * * *0 1 * * *next day
0 22 * * *0 2 * * *next day
0 23 * * *0 3 * * *next day

Questions

How do I convert a cron expression from AST to UTC?

UTC is currently 4 hours ahead of AST. Add 4 hours to the hour field, and shift the day-of-week if the time crosses midnight. For example, 0 9 * * 1-5 (weekdays at 09:00 AST) becomes 0 13 * * 1-5 in UTC.

What is the time difference between AST and UTC?

Atlantic Time is UTC-4 / UTC-3 and Coordinated Universal Time is UTC+0. Right now uTC is currently 4 hours ahead of AST.

Does daylight saving time affect AST to UTC cron conversion?

AST observes daylight saving time, so the difference between AST (UTC-4 / UTC-3) and UTC (UTC+0) changes during the year. Re-check your converted cron after each DST change.

What is midnight AST in UTC cron?

Midnight in AST (0 0 * * *) is 0 4 * * * in UTC.

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