{
1 => [ 28, 29, 30, 31].map { |m| m * DAYS },
2 => [ 59, 60, 61, 62].map { |m| m * DAYS },
3 => [ 89, 90, 91, 92].map { |m| m * DAYS },
4 => [120, 121, 122, 123].map { |m| m * DAYS },
5 => [150, 151, 152, 153].map { |m| m * DAYS },
6 => [181, 182, 183, 184].map { |m| m * DAYS },
7 => [212, 213, 214, 215].map { |m| m * DAYS },
8 => [242, 243, 244, 245].map { |m| m * DAYS },
9 => [273, 274, 275, 276].map { |m| m * DAYS },
10 => [303, 304, 305, 306].map { |m| m * DAYS },
11 => [334, 335, 336, 337].map { |m| m * DAYS },
12 => [365, 366] .map { |m| m * DAYS }
}