CRN0

AST to GMT cron converter

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

UTC-4
UTC+0
0 13 * * *

At 13:00 every day in London.

Show timeline and next runs
Halifax
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London
Each amber mark is a run time. The top strip shows Halifax local time and the bottom strip shows London 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.

HalifaxLondon

Examples

ASTGMT
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 GMT?

GMT 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 GMT.

What is the time difference between AST and GMT?

Atlantic Time is UTC-4 / UTC-3 and Greenwich Mean Time (UK) is UTC+0 / UTC+1. Right now gMT is currently 4 hours ahead of AST.

Does daylight saving time affect AST to GMT cron conversion?

AST and GMT observe daylight saving time, so the difference between AST (UTC-4 / UTC-3) and GMT (UTC+0 / UTC+1) changes during the year. Re-check your converted cron after each DST change.

What is midnight AST in GMT cron?

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

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