function parseInt96Nanos(value) {
  const days = (value >> 64n) - 2440588n
  const nano = value & 0xffffffffffffffffn
  return days * 86400000000000n + nano
}
Converts INT96 date format (hi 32bit days, lo 64bit nanos) to nanos since epoch
@param {bigint} value
@returns {bigint}