Short-tempered with my boyfriend only during the day.?

This probably sounds really ridiculous but...

If I meet my boyfriend in the day I automatically become bad-tempered and distant until about 9pm at night when I seem to relax and become 'cuddly' per say. Only when I stay over at his house for the night, I seem relaxed enough to be okay with him during the day, because I've gotten used to being with him... if you know what I mean.

I dunno, it's really stupid but I'm just wondering if anyone else does this and if they know why. It's like I feel annoyed by a lot with him in daylight, but no one else even though I look forward to seeing him before we meet. But at night I feel absolutely great - he's an amazing boyfriend and I always feel happy at the end of the day when I've been with him. It just takes me some time to adjust.

Weird?