export declare const unixTimestampInMs: (str?: string) => number;
export declare const unixTimestampInSeconds: (str?: string) => number;
export declare const iso8601: (str?: string) => string;
export declare const rfc3339: (str?: string) => string;
export declare const msToUTCString: (ms: number) => string;
export declare const secondsToUTCString: (s: number) => string;
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