export declare function nowISO(): string;
export declare function toDateStamp(date?: Date): string;
export declare function parseISOTime(value: string | undefined): number | null;
export declare function compareISODesc(left: string | undefined, right: string | undefined, fallback?: number): number;
export declare function ageInDays(isoTimestamp: string | undefined, now?: Date): number | null;
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