I've probably upvoted something similar before, but heck yes:

One of my world's calendars has two intercalary days every month: essentially the month goes ( Mon Tue Wed Thu Fri Sat Sun ) twice, then Darkmoon, then ( Mon Tue Wed Thu Fri Sat Sun ) twice again then Lightmoon. The days are included in the numbering (so Darkmoon is the 15th and Lightmoon the 30th).

Just to add to the fun, there are two calendars of the three in the world that use this scheme, but they differ in that a) the month and day names are different; and b) for one, the year number changes on the 1st of the 7th month relative to the other calendar (and has a different year 0).

For my own worldbuilding, I have a standard 6-day week. However, there is one month of the year where each week has a seventh day. Each of these seventh days are intercalary and are named, instead of numbered.

Furthermore there are intercalary weeks in between certain months, which do not count towards the world's "month number".

It would be super awesome if I could represent my world's calendar system in LegendKeeper!

Right now, instead, I have to make multiple months like so:

etc.

to represent my month with seven days. This throws off the numbering system of the months (i.e. "6" no longer represents my sixth month, but one of these intercalary days), which means date notations like 12/6/1632 don't "mean" anything anymore. And it makes dates within that month with intercalaries mean nothing also, because "1/M_w_i_w_2" was actually supposed to be the day numbered "7" of that month (following its first, seven-day week where the seventh day is intercalary, and named instead of numbered).

This adds mental upkeep to whenever I see a date represented in my notes, which is of course the whole thing an awesome tool like LegendKeeper tries to combat, as one of its base design principles.

Thanks devs for an amazing tool! Would love a little tweak for my esoteric requirements.

Hello, I'm supposed i'm not the only guy to ask you this update. Your timeline and calendar are awesome but Something missing to create a complete warhammer fantasy Imperial Calendar : the intercalary days.

Rules :

In the Imperial Calendar, the 6 festival days (Einnewacht, Tag der Goldene Krone, Mittherbst, Mondstille, Sonstillenacht, Hexensnacht) are individual intercalary days inserted between certain months.

They:

Maybe for some other calendars , we need intercalary month too.

Thanks and bravo for your works !!

Illu.