I support this proposal.
That being said:
1) A month can be anything between 28 and 31 days so I would have preferred a clearer statement. But this a problem in general and I am certain RIPE will follow this in a pragmatic way.
FOSDEM takes place in February for example, other conferences can be "impacted" in a similar way.
2) Yet again, I had to diff the text as there's no easily available diff. I will take this up within ncc-services-wg though as that's the best place afaics.
3) It would be appreciated if the -announce list could be moderated or BCC'ed in the initial email, or the reply-to mangled appropriately, as people hitting reply-all is an all-too-common and easily avoided annoyance.