I’m the same, just can’t motivate myself to get out on my mtb during the week. I make up the time with running now as it keeps the fitness ticking over (well, in fact its increasing my fitness and dropping weight) until the lighter nights. I don’t know where this has came from, I used to love night riding but just can’t seem to get myself out.
This is compounded by pressure for time on weekends, it only takes one night on the beer and it can sometimes be 2/3 weeks between visits to the bike :(