Dhàder

Dhàder is the second month of the King's Calendar of the dwarves. The month is the last month of winter, and varies in length between 28 and 29 days.

On years divisible by four, the month contains 29 days, except for years divisible by 100 where it contains 28. If the year is also divisible by 400, it contains 29 days as well. On all other years, the month contains 28 days. The extra day is referred to as the 29th of Dhàder.