CRN0

BRT to AST cron converter

AST is currently 1 hour behind BRT. Convert AST to BRT

UTC-3
UTC-4
0 8 * * *

At 08:00 every day in Halifax.

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

São PauloHalifax

Examples

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

Questions

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

AST is currently 1 hour behind BRT. Subtract 1 hour 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 BRT) becomes 0 8 * * 1-5 in AST.

What is the time difference between BRT and AST?

Brasília Time is UTC-3 and Atlantic Time is UTC-4 / UTC-3. Right now aST is currently 1 hour behind BRT.

Does daylight saving time affect BRT to AST cron conversion?

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

What is midnight BRT in AST cron?

Midnight in BRT (0 0 * * *) is 0 23 * * * in AST, on the previous day.

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