Have never done anything different just proceed as per every other day. Both are used to sleeping when it is light (I don't darken room for naps, and just have normal blinds so not blacked out at night time) so I don't think makes that much of difference here. In the UK in summer is light till 10 at night, so I was always used to going to bed when light too, maybe this is why had never occurred to me to do anything different regarding bed time with DD and DS.