Alot of sailors and people in that line of work that can use the stars and position of the sun to accurately tell time and date.
Apart from this, I don't think there's much more as far as practical ways go.
If you find a chick with a really punctual menstrual cycle you can tell the time off her.
Then there's the ground hog but that's been proven to be getting more and more inaccurate.
Same with hibernation patterns thanks to climate change.