This addon adds 16 uniquely colored calendars that show the in-game date when looked at.

With special features such as:

Custom events
Default events
Yearly events
Partial multi-lingual support
Customizable starting year
Leap year support

But before you can use any of these, you'll first need to start-

Crafting the Calendar

For this, you'll need 6 paper and 3 of your favorite colored dye

Crafting recipes for each color variant, 3 dye on top and 6 paper on bottom

But maybe you decide you want a new color, or you only have one of your favorite colored dye.

Whatever the case, you can dye pre-existing calendars

Calendars being dyed to all 16 color variants

After this, you'll probably want to make sure your calendar doesn't just go to waste, in that case, might you consider-

Using the Calendar

First off, you'll notice that when you look at a calendar, it will show: the in-game-date, day count, and potentially, an event that is happening on that day. But you might be tired of looking, maybe you want to start doing. To do so, first right click the calendar. This will bring you to this screen:

Event Management UI From here, click the "Create" button. (We'll talk about the "Delete" button later) This will bring you to a screen where you can start-

Creating Events

(The Fun Part)

As you can see I've already filled this out. Usually the first thing you'll see will be a seemingly empty textbox. Click on it, and it will reveal a golden formatting code, you can change it to whichever one you like. Next you'll see options for the month, day, and year. By default these will be set to January 1st, [CURRENT YEAR]. Last but not least, you'll see a yearly toggle. By default this is on, meaning the next in-game year will also have this event and the year slider will be ignored. Turning the yearly toggle off will delete the event after it has passed. Some examples of events you'll want to be yearly may include: birthdays and special holidays. Where as a deadline should probably only occur once. After you've set your settings, press create. So long as you haven't done anything wrong (You'll get an error if you do). You'll see something like this on the day of the event:

But maybe you did something wrong, or you just changed your mind. Then you might want to consider-

Deleting Events

Click the dropdown and select the event you wish to delete, then, press the "Delete" button.

Additional Info:

Some UI elements use mojang translations, this includes the current month
Almost everything supports translation, the only thing that doesn't is the ordinal numbered date
You can set the starting year with "/scriptevent calendars:set_starting_year [year]"
Starting year must be >99, otherwise it will be set to the 1900s.
The default starting year is 2000
There are 11 default events, can you find them all?
Events are player-specific