Finally - after 8 days of work and weather to limit my options, I got to run W3R2 today. Warm sun on my back, even at 8.45am in January, made it a fairly pleasant experience. I was a bit nervous given the longer than strictly necessary eight "rest" days (well, I never claimed not to be fundamentally lazy) but it went well and I'll feel more confident finishing this week and moving to W4.
I'm slightly tempted to do W3R3 tomorrow, given I had such a long break. I'll see how the legs feel today and maybe try a late afternoon run tomorrow - it would be good to feel happier about running at a different time of day. It would give me more flexibility in fitting runs in between other things. Maybe running into the sunset would be as good as running into the dawn.
I'd be interested to know if other people are "strict" about when they run.