CRN0

JST to BRT cron converter

BRT is currently 12 hours behind JST. Convert BRT to JST

UTC+9
UTC-3
0 21 * * *

At 21:00 every day in São Paulo.

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

TokyoSão Paulo

Examples

JSTBRT
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 JST to BRT?

BRT is currently 12 hours behind JST. 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 JST) becomes 0 21 * * 0-4 in BRT.

What is the time difference between JST and BRT?

Japan Standard Time is UTC+9 and Brasília Time is UTC-3. Right now bRT is currently 12 hours behind JST.

Does daylight saving time affect JST to BRT cron conversion?

Neither JST nor BRT observes daylight saving time, so the 12 hours difference stays the same all year.

What is midnight JST in BRT cron?

Midnight in JST (0 0 * * *) is 0 12 * * * in BRT, on the previous day.

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