Function createUtcTimestamp

packages/parser/src/formats/google-chat-takeout.ts:111–132

(
  year: number,
  monthIndex: number,
  day: number,
  hour: number,
  minute: number,
  second: number
)

}

function createUtcTimestamp(
  year: number,
  monthIndex: number,
  day: number,
  hour: number,
  minute: number,
  second: number
): number | null {
  const timestampMs = Date.UTC(year, monthIndex, day, hour, minute, second)
  const date = new Date(timestampMs)
  if (
    date.getUTCFullYear() !== year ||
    date.getUTCMonth() !== monthIndex ||
    date.getUTCDate() !== day ||
    date.getUTCHours() !== hour ||
    date.getUTCMinutes() !== minute ||
    date.getUTCSeconds() !== second
  ) {
    return null
  }
  return Math.floor(timestampMs / 1000)
}

function parseChineseUtcDate(value: string): number | null {
  const match = normalizeSpaces(value).match(