CRN0

AWST to AST cron converter

AST is currently 12 hours behind AWST. Convert AST to AWST

UTC+8
UTC-4
0 21 * * *

At 21:00 every day in Halifax.

Show timeline and next runs
Perth
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Halifax
Each amber mark is a run time. The top strip shows Perth 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 Perth.

PerthHalifax

Examples

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

Questions

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

AST is currently 12 hours behind AWST. Subtract 12 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 AWST) becomes 0 21 * * 0-4 in AST.

What is the time difference between AWST and AST?

Australian Western Time is UTC+8 and Atlantic Time is UTC-4 / UTC-3. Right now aST is currently 12 hours behind AWST.

Does daylight saving time affect AWST to AST cron conversion?

AST observes daylight saving time, so the difference between AWST (UTC+8) and AST (UTC-4 / UTC-3) changes during the year. Re-check your converted cron after each DST change.

What is midnight AWST in AST cron?

Midnight in AWST (0 0 * * *) is 0 12 * * * in AST, on the previous day.

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