Alex - could you maybe just set the timer to switch the lights on a bit later in the day so that the lights then switch off later in the evening, say at midnight or roughly at the time you go up to bed. That way, when you're home from work you get to see the tank with the lights on until bedtime. So long as your plants are getting their required amount of light it doesn't matter what time of the day the lights are switched on, does it?
There are those "blue" moonlight tubes that some people have to light their tanks in the evening (or little blue LEDs) - maybe that's something to consider if you don't want to change the routine of your normal tank lights.
Regards - Athena