RFC5905 uses 32 bits for era number and 32 bits for era offset in the 128 bit timestamp type. Though I don't think the 128 bit timestamp is used much...I can't

RFC5905 uses 32 bits for era number and 32 bits for era offset in the 128 bit timestamp type. Though I don't think the 128 bit timestamp is used much...I can't find support for it in either ntpd or chrony.