Man Pages in systemd-cron

1
Section 1: Executable programs or shell commands

crontab.1

Maintain crontab files for individual users
1
Section 5: File formats and conventions

crontab.5

Tables for driving cron
1
Section 7: Miscellaneous

systemd.cron.7

Systemd cron units
1
Section 8: System administration commands

systemd-crontab-generator.8

Translate cron schedules in systemd units