CRN0

UTC to AST cron converter

AST is currently 4 hours behind UTC. Convert AST to UTC

UTC+0
UTC-4
0 5 * * *

At 05:00 every day in Halifax.

Show timeline and next runs
UTC
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00061218
Halifax
Each amber mark is a run time. The top strip shows UTC local time and the bottom strip shows Halifax 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 UTC.

UTCHalifax

Examples

UTCAST
0 9 * * *
0 5 * * *
0 9 * * 1-5
0 5 * * 1-5
*/15 * * * *
*/15 * * * *
0 0 * * *
0 20 * * *
30 2 * * 0
30 22 * * 6
0 0 1 * *
0 20 31 * *
0 */6 * * *
0 2-23/6 * * *
0 17 * * 5
0 13 * * 5
Every hour of the day
0 0 * * *0 20 * * *day before
0 1 * * *0 21 * * *day before
0 2 * * *0 22 * * *day before
0 3 * * *0 23 * * *day before
0 4 * * *0 0 * * *
0 5 * * *0 1 * * *
0 6 * * *0 2 * * *
0 7 * * *0 3 * * *
0 8 * * *0 4 * * *
0 9 * * *0 5 * * *
0 10 * * *0 6 * * *
0 11 * * *0 7 * * *
0 12 * * *0 8 * * *
0 13 * * *0 9 * * *
0 14 * * *0 10 * * *
0 15 * * *0 11 * * *
0 16 * * *0 12 * * *
0 17 * * *0 13 * * *
0 18 * * *0 14 * * *
0 19 * * *0 15 * * *
0 20 * * *0 16 * * *
0 21 * * *0 17 * * *
0 22 * * *0 18 * * *
0 23 * * *0 19 * * *

Questions

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

AST is currently 4 hours behind UTC. Subtract 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 UTC) becomes 0 5 * * 1-5 in AST.

What is the time difference between UTC and AST?

Coordinated Universal Time is UTC+0 and Atlantic Time is UTC-4 / UTC-3. Right now aST is currently 4 hours behind UTC.

Does daylight saving time affect UTC to AST cron conversion?

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

What is midnight UTC in AST cron?

Midnight in UTC (0 0 * * *) is 0 20 * * * in AST, on the previous day.

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