Hi. There is a festival on the 30th in Edinburgh, yes. But that doesn't mean that's the one true date. At least reading the wikipedia entry will give some background. I think changing our calendar entry would be wrong.
By the way, your mail would have been clearer if you'd attached a diff. jmc Original Message From: Craig Skinner Sent: Friday, 1 May 2015 11:29 To: misc@openbsd.org Subject: Fwd: Friday's Calendar;- Beltane is evening of 30th April Hiya, Beltane was last night in the capital city: ----- Forwarded message from Reminder Service <skin...@britvault.co.uk> ----- Date: Fri, 1 May 2015 07:09:01 +0100 (BST) From: Reminder Service <skin...@britvault.co.uk> To: skin...@britvault.co.uk Subject: Friday's Calendar ... .. May 01 Beltaine; Feast of the god Bel, sun god May 01 May Day in many places May 01 May Day / Beltane / Bealtaine - Celtic bonfire festival ... .. ----- End forwarded message ----- Many of my dance partners have (leading) roles in this Keltic (& other) events - superb photos of living Scottish culture: The Edinburgh Beltane 2015 Thu 30 Apr 2015, Calton Hill. Taking place at Calton Hill on the night of 30th April each year, the Beltane Fire Festival marks the beginning of summer. http://www.EdinburghTourist.Co.UK/beltane-festival-calton-hill/ The modern Beltane Fire Festival is inspired by the ancient Gaelic festival of Beltane which began on the evening before 1 May and marked the beginning of summer.[1][2][3] The modern festival was started in 1988 by a small group of enthusiasts including the musical collective Test Dept, with academic support from the School of Scottish Studies at the University of Edinburgh. Since then the festival has grown, and now involves over 300 voluntary collaborators and performers with available tickets often selling out. http://en.wikipedia.org/wiki/Beltane_Fire_Festival#Historical_background Bonfires continued to be a key part of the festival in the modern era. http://en.wikipedia.org/wiki/Beltane#Bonfires Since 1988, a Beltane Fire Festival has been held every year during the night of 30 April on Calton Hill in Edinburgh, Scotland. http://en.wikipedia.org/wiki/Beltane#Revival https://www.facebook.com/beltanefiresociety $ egrep -R 'Be[a]?lta[i]?ne' /usr/src/usr.bin/calendar /usr/src/usr.bin/calendar/calendars/calendar.history:05/01 Beltaine; Feast of the god Bel, sun god /usr/src/usr.bin/calendar/calendars/calendar.pagan:05/01 May Day / Beltane / Bealtaine - Celtic bonfire festival $ fgrep -iR 'May Day' /usr/src/usr.bin/calendar /usr/src/usr.bin/calendar/calendars/calendar.holiday:05/01 May Day in many places /usr/src/usr.bin/calendar/calendars/calendar.holiday:05/07 May Day in United Kingdom /usr/src/usr.bin/calendar/calendars/calendar.pagan:05/01 May Day / Beltane / Bealtaine - Celtic bonfire festival