Help:Extension:WikimediaCampaignEvents

The WikimediaCampaignEvents extension provides additional features for the CampaignEvents extension that are specific to Wikimedia wikis.

Grant ID
When enabling or editing event registration, there is a new field that allows you to enter the grant ID associated with the event, if you have one. You can only enter this information if the grant has been granted in the last 24 months. Also, note that you will have to enter the numeric part of the ID only; for instance, if your grant ID is G-1111-1111, you would enter 1111-1111.

The ID is only visible to the event organizers, both in the registration form and in Special:EventDetails.