Нажмите на знак вопроса рядом с полем расписания, чтобы получить подробное объяснение синтаксиса.
Там сказано:
This field follows the syntax of cron (with minor differences). Specifically, each line consists of 5 fields separated by TAB or whitespace:
MINUTE HOUR DOM MONTH DOW
MINUTE Minutes within the hour (0–59)
HOUR The hour of the day (0–23)
DOM The day of the month (1–31)
MONTH The month (1–12)
DOW The day of the week (0–7) where 0 and 7 are Sunday.
Так что в вашем случае нужно поставить:
30 22 * * *
В отношении часовых поясов документ гласит:
Time zone specification
Periodic tasks are normally executed at the scheduled time in the time zone of
the Jenkins master JVM (currently Europe/Berlin). This behavior can optionally
be changed by specifying an alternative time zone in the first line of the field.
Timezone specification starts with TZ=, followed by the ID of a time zone.
Таким образом, ваша полная запись cron:
TZ=Asia/Istanbul
30 22 * * *