There are a lot of anniversaries around at the moment.
Yesterday was the 500th anniversary of the battleof Flodden - the last time a British monarch was killed in battle. 500's always a big anniversary - half a millennium, not an anniversary you'd dare miss. (And yes I havebeen, you probably didn't notice, 494 years on)
Yesterday was also the 1st anniversary of the end of London 2012. Not such a big anniversary, number one, indeed I don't think I saw a single feature in the media remembering the occasion. (Yes, I reported on it, but then I would wouldn't I?)
This month sees the 400thanniversary of the New River. 400's not quite such a good anniversary as 500, but those of us alive today are never going see 500, so 400's our best chance to celebrate. (I've been waiting for years to walk the New River and blog about it, so strong is the power of the 400th anniversary)
This month also sees the 125th anniversary of the Jack The Ripper murders. 125 is definitely a lesser anniversary, but it's the best between 100 and 150, so many are making the most of it. (Again I knew I'd writeabout Jack The Ripper one day, and have long pencilled in the 125th anniversary as the most appropriate moment)
This blog was 11 years old at the weekend. I didn't mention it because 11 is a rubbish anniversary. (I've celebrated all this blog's previous anniversaries, but somehow the 11th didn't quite seem worth it)
Last Thursday they celebrated John Wisden's 187th birthday with a Google Doodle. 187 is an insignificant anniversary, the sort that nobody normally bothers to celebrate. Perhaps it's good that Google remembers, or perhaps it's just a bit strange.
Then last Friday they celebrated Leonidas da Silva's 100th birthday with a Google Doodle. Less well known person, more important anniversary. Indeed you could argue that 100 is the greatest anniversary of them all - ten to the power of two, a full round century. Long enough ago that a commemoration feels proper special, yet not so long that all trace of the event has disappeared. 100 is surely top of the pile.
So I thought I'd try to construct a hierarchy of anniversaries, a league table from top to bottom, starting with the most important and working down to the also-rans. You might agree or you might not, but let me know and then I might shuffle the numbers around later.