Photos form 1 April
Common chickweed (Stellaria media). I've been fascinated with these tiny white flowers since my earliest childhood. Now that it's in bloom, maybe that's a sign that it's really spring, after all the "usual suspects" have been in bloom since late January if not last year.
Red dead-nettle (Lamium purpureum), another old-time favourite of mine. With some more chickweed to show how tiny its flowers really are, but I didn't do that on purpose.
The sunniest dandelion on a cloudy afternoon: