[Game Aid] Gruv Calendar

[Boneguard]

For a side project of mine (porting 1879 to Shadowrun), I've worked on the calendar of the Gruv which can be found here.

Basically the document provided:
1) the 7 possible calendars (one starting on each day of the week);
2) Which calendar matching for which Gruv year (over 280 years worth),
3) The Date equivalency for the opening of the portal on June 6th 1876 @15:02 and the date of June 6th 1876 @15:02 when it could be crossed.
4) The Equivalency of New Year for the years 1876 to 2090 in the Gruv Calendar

This datation is based on the calendar from p.33 of the player's Guide which is, itself based on the calendar of 1879. 1879 would be the 4th Gruv Year (year 1 being 1876 even if it is, technically, a partial year and no one was able to cross until 1877).

Oviously, Earth year and Gruv year doesn't match up exactly (as the year and day are shorter and there is no leap year in the Gruv) and every 73 year or so, there will be 2 Gruv year starting during that Earth year.

There a hidden tab which shows:
1) my calculation based on the number of secondes per day
2) The leap years between 1875 and 2081
3) the years (from June 6th to June 5th)

[Slimcreeper]

Thanks for sharing this!

So I understand how to use it - Y:1 corresponds to what year? The C: row tells you which calendar to use, right?

[Boneguard]

Thanks for sharing this!

You are welcome.

So I understand how to use it - Y:1 corresponds to what year? The C: row tells you which calendar to use, right?

For the purpose of ease of reference, the decison is to have the Gruv Year 1 correspond to 1876 when Prof. Grosvenor open the portal. Granted no one was there yet as the portal was uncrossable, but the event was significant enough to mark it as the Starting year.

So the first humans (and the Boojums) crossed and arrived in the Gruv Year 2 (1877) onward. And I took the liberty to assume that the 1879 modified calendar found on p.33 of the Player's Guide was the first Calendar created/used (which correspond to the Gruv Year 4) and the calendar for year 1, 2 and 3 are, effectively, proleptic calendar (retroactively establish based on the adoption of the Gruv modified Calendar).

And yes the C: row indicate which of the 7 calendars to use for that year.

Edit: Granted when it comes to match dates between the Earth calendar and the Gruv calendar, it becomes tricky as the year/day doesn't match exactly (that where the conversion of days into seconds makes it a bit easier to figuare out the date equivalency). But on the other hand, it's really handy for Gruv specific campaign/mission.