Hourly WP schedule, do I need at least 1 visitor hourly?

As you’ve noted, cron jobs are only fired when someone visits your website. WordPress checks if they are any events that have been scheduled before ‘now’ that have not yet occurred – and runs them.

Importantly with events that are recur according to a regularly pattern (say hourly) – their occurrence is relative not absolute. That is, once your event triggers it will be scheduled again in an hour’s time (rather than being schedule for 1:05, 2:05, 3:05) – of course with no guarantee that it will actually run in an hours time.

In fact with recurring events WordPress only keeps one occurrence saved. Once that occurrence is trigged it is replaced with the next one.

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