interface Date {
    /** Minimum date value */
    minValue: Date;
    /** Add a number of days */
    addDays(days: number): Date;
    /** Add a number of minutes */
    addMinutes(mins: number): Date;
    /** Add a number of seconds */
    addSeconds(secs: number): Date;
    /** Get the number of days between two dates */
    diffDays(date: Date): number;
    /** Get the number of hours between two dates */
    diffHours(date: Date): number;
    /** Get the number of minutes between two dates */
    diffMinutes(date: Date): number;
    /** Get the number of seconds between two dates */
    diffSeconds(date: Date): number;
}