bc518174
 王天杨
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/**
* @name isFirstDayOfMonth
* @category Month Helpers
* @summary Is the given date the first day of a month?
*
* @description
* Is the given date the first day of a month?
*
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
*
* @param date - The date to check
* @returns The date is the first day of a month
*
* @example
* // Is 1 September 2014 the first day of a month?
* const result = isFirstDayOfMonth(new Date(2014, 8, 1))
* //=> true
*/
export declare function isFirstDayOfMonth<DateType extends Date>(
date: DateType | number | string,
): boolean;
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