• Get a UTC season constant for a date. Seasons are groups of 3 months, e.g. Spring, Summer, Autumn, Winter.

    The returned value will be a number between 0 and 3, where:

    • (Mar, Apr, May) = 0
    • (Jun, Jul, Aug) = 1
    • (Sep, Oct, Nov) = 2
    • (Dec, Jan, Feb) = 3

    Parameters

    • date: number | Date

      either a date to get the season for, or a number representing the UTC month of a date (0 is January, 11 is December)

    • Optional local: boolean

      if true then use local date components, otherwise UTC

    Returns 0 | 1 | 2 | 3

    a season constant number, from 0 - 3

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