D.K.
I am with the thought since a one year old needs at least 15 hours of sleep that 7:00 is a perfect time if he is waking at a decent hour.
After the three year mark I raised it by half hour, like my son used to have to be in bed by 7pm at three, now he is four he gets to stay up until 7:30 and his big sis gets until 8:30. I will keep her on 8:30 until she is at least 10 probably as she needs a good 10+hours of sleep a night!!! :)
I think it is important to have your own personal mommy (mommy and daddy time) and unwind time in the evenings and putting him down at 7pm is the perfect way to get it.
As he hits two maybe see how he is doing with waking and napping and maybe put it to 7:30ish. I gauge with bedtimes if they are too tired then maybe not a good idea to push it up, but if he is not grouchy or overly tired it is really your call.