Current implementation of CronSchedule.isTime() is not traditional

[MikeD74]

Look at the excerpt from man pages (https://linux.die.net/man/5/crontab):
Note: The day of a command's execution can be specified by two fields - day of month, and day of week. If both fields are restricted (ie, aren't *), the command will be run when either field matches the current time. For example,
"30 4 1,15 * 5" would cause a command to be run at 4:30 am on the 1st and 15th of each month, plus every Friday.