The last few weeks have all been about significant anniversaries. Several have been personal: Chris and I have been remembering our wedding (18 years), our fathers (25 years since his Dad died, 20 years since mine) and my mother (who died a year ago). Two have been political: 100 years since the beginning of the Armenian genocide, 70 since VE Day. All of which has got me thinking about such occasions, why they matter, and how they are best marked.
Anniversaries matter because they…