A small programm to help you identifiy if a cron is configured to be run on a given date/time.
git clone ...
composer install
Download latest Phar https://github.com/schmaun/cron-assistant/releases/tag/v1.0-alpha.1
./app.php --path <path where crontab files are.> <Date/Time>
To find cronjobs that are configured for January 1st 2018:
./app.php --path /etc/cron.d/ 2018-01-01
To find cronjobs that are configured for January 1st 2018 at 4o'clock (from 4 to 5):
./app.php --path /etc/cron.d/ 2018-01-01 04
To find cronjobs that are configured for January 1st 2018 at 4:10:
./app.php --path /etc/cron.d/ 2018-01-01 04:10