Add a Calendar System to Medieval RPEngine

[Optimus0324]

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To allow progression of time in roleplay, for aging, historic events, and such adds a layer of roleplay immersion. Its in my opinion, essential.

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Create a easily configurable 7 day calendar system so that time progresses at a pretty steady rate and isn't overly slow.

Table for Calendar:
7 Days = 1 year
1 Day = 1 month
6 Hours = 1 Week
1 Hour = 1 Day

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