<gh_stars>1-10
holiday = {
    12: [30, 31],
    1: [1, ],
    2: [2, 3, 4, 5, 6, 7, 8, 9, 10],
    4: [5, 6, 7],
    5: [1, 2, 3, 4],
    6: [7, 8, 9],
    9: [13, 14, 15],
    10: [1, 2, 3, 4, 5, 6, 7]
}
