Hello
Further on from the fault I had, I disabled all my plugins and then activated each, one by one, until I found the culprit –
https://wordpress.org/plugins/greatest-contact-form/
If I activate that plugin, Event Calendar will not let me change the date from the current date (it also changed all the drafts i had in Event Calendar from last weeks dates, to today’s date) and also will not let me leave DRAFT so I can’t ‘Publish’ my event.
I wasn’t using the contact plugin, so I can leave it deactivated. I thought you’d like to know.