Ah, yes, at long last, the Vulcan calendar my husband and I spent weeks on!

Canon never seems to agree, as we all know. Resources on the very same page disagree how long a second, a minute, and an hour is on Vulcan vs on Earth, and none of the math adds up in any way. After coming up with three separate versions of how time works on Vulcan, Joel decided to lean towards how long resources said Vulcan minutes were, match up the length of a Vulcan year to an Earth year, and start coming up with Vulcan months in relation to Earth months!

Because Tasmeen means both End of Year and autumn, I decided to link their end of year to our autumn. Because K'riBrax means Fast One, I thought it made most sense to make that month the shortest. And after a lot of studying… ta-da! A Vulcan calendar!

Most months begin or end on a half-day, hence the half-coloring on a calendar day. Below is the math we used, and above is when holidays are and how the Vulcan calendar matches up to the Earth one ( in my headcanoning ).

Of course, you don’t need to adopt or use this calendar for anything. Genuinely? Truly? I spent weeks of my life doing this so I could have Aella celebrate the Vulcan New Year, Kal Rekk, and the Festival of T’Plana-Hath. ( For the record, I’m thinking Rumarie used to be the same day as the Festival of T’Plana-Hath! )

There are roughly 21 days in a Vulcan month, and 252 days in a Vulcan year!

Feel free to use these dates or not at all!

The Math Part

Assume: 1 V yr = 1 E yr

1 V month (21 V days) = 1 E month (30 E days)

1 V day (18 V hours) = 1.43 E days (34.29 E hours)

1 V hour (60 V minutes) = 1.9 E hours (114.29 E minutes)

1 V minute (54 V seconds) = 2.12 E minutes (126.98 E seconds)

1 V second = 2.35 E seconds

