It is highly based on the Germanic calendar.
Year 1 of the Shire Calendar corresponded when the Shire was founded by the Bree Hobbits Marcho and Blanco in the year 1601 of the Third Age. Therefore, years of the Third Age can be converted to Shire-years by subtracting 1600.
The last year of the Third Age was year 1421 on the Shire calendar.
Months of the year and special days
The Shire calendar's year was divided into 12 months of 30 days. Five additional days were added to create a 365-day year. The months followed the lunar cycle.
|Month number||Name||Approximate relationship to Gregorian calendar|