Hello, @splacka.
Thank you for contacting us regarding this questions.
Here are the list of features that your can achieve using markers Period option:
1. It will automatically start to appear on the specified date and disappear automatically at the appointed time.
2. If the user chooses a date in the past — make the expired markers appear on the map.
3. When the user chooses a future date, the marker for that date should be displayed.
4. Set the initial screen to the data for the current date, and color the selected date to distinguish it from the other dates.
Read more about how to configure periods for markers you can here: https://supsystic.com/example/markers-displaying-by-period/