TECO ^B on OS/8 and RT-11

For RT-11, after 2003, those 5 year bits are reused, so the RT-11 development team finally published (around 1989) how the dates after 2003 would be kept - at least until 2099. If you understand the RT-11 value, then there are still 2 bits left in the 16 bit word for the date at the high end. Starting on January 1st, 2004, bit 14 is set and added to the 5 low order bits for the year - in bit position 5 of course - so that if bit 14 is set, 32 years are added to the low order 5 bits for the year. Starting on January 1st, 2036, bit 15 is set (bit 14 is unset) and 64 years are added to the low order 5 bits for the year. Starting on January 1st, 2068, both bits 14 and 15 will be set and 96 years are added to the low order 5 bits for the year.