Pick a spot and watch the sun rise. Now put a post in the ground in between the spot you are standing and the point on the horizon the sun rose above.

Now stand on that spot day after day (some days will be too cloudy to see the sun, but keep it up and you'll see a trend.) At first, depending on the season and the hemisphere you're in, you'll see the point on the horizon the sun's rising above move in one direction. But one day it will reverse. Put a post between your standing spot and the farthest in that direction the sun rose above the horizon. This may take a few years to see because of cloudy days, but eventually you'll have it nailed down.

This extreme is called the solstice. There are two of them in a year, and they mark the start of summer or winter. They have either the shortest or longest period of daylight depending on the season.

Now watch for about 6 months more from your spot, and you'll find another extreme point on the other side of your first post. This is the other solstice. Put a post there.

You'll find that it takes 365 sunrises to make the complete cycle through both solstices.

Do you have an area in mind that this might happen? Every environment on Earth that's suitable for organic life's survival seems to already be swarming with microbes