export declare function mmddInRange(mmdd: string, start: string, end: string): boolean;
export interface SeasonDateRange {
    id: string;
    start_date?: string | null;
    end_date?: string | null;
    durations?: {
        start: string;
        end: string;
    }[] | null;
    is_active?: boolean;
}
export declare function seasonMatchesDate(season: SeasonDateRange, isoDate: string): boolean;
export declare function findMatchingSeasonId(seasons: SeasonDateRange[], isoDate: string | undefined | null): string | null;