Even though we have been married for a couple of years we still enjoy "date night".
There are farmers markets every day of the week in Sacramento, but the best is the under-the-freeway market on Sunday – the fish, meat, honey, nut, veggie, wine vendors are all excellent.
You can always walk 1.5 blocks away to the Asian farmers market at 5th and Broadway, just don't buy a live duck unless you really know what to do with it – that one has even better prices but a more limited selection but the fresh tofu can't be beat.
There's also a midtown FM on Saturday and another at McKinley Park, also on Saturday I think, that are OK, but the one under the freeway at 6th and X on Sundays from 7 am to 11 is really the best one.
If you park at the end of the road at sutter's landing park, you can take a nice walk along one of the paths through the bushes to the water and the river bank is nice and clean along this area due to the effort by volunteers who keep it pretty nice and the water is sparking. You can put your toes in and walk along the sand quite a ways. You can also walk the bike path to the train tracks and see the bats come out just after sunset.