Kyoto Cherry Blossom Full Flower dates | Datagraver:

tl;dr - Earlier and earlier, with fewer outliers. This is a very obvious change and you can really see the timeline.

1. A reminder that some societies have had really good records for a really long time.
2. I'd joke this was chilling data, but this is too serious.

Since the year 812 people in Japan have recorded the first day in the year the Cherry Blossom was in full bloom in Kyoto. Based on this record you can see some of the local climate effects.