Here's an interesting take on a calendar tool:
https://fantasy-calendar.com/
In addition to basic calendar functionality, you can also add weather and events directly to the calendar. Presets for a number of well-known RPG worlds are available, and you can also import a JSON file. The user interface could be friendlier, though - it's not always clear in which order the values should be input.
(Click New Calendar to toy with the settings.)
https://fantasy-calendar.com/
In addition to basic calendar functionality, you can also add weather and events directly to the calendar. Presets for a number of well-known RPG worlds are available, and you can also import a JSON file. The user interface could be friendlier, though - it's not always clear in which order the values should be input.
(Click New Calendar to toy with the settings.)
