Before 1 AD people weren't very clever, and tended to count backwards. It wasn't until Greg O'Ryan came along that dates as we know them were finally sorted out! ;-)
Well, that's going to depend who you were, isn't it? Now if you just happened to be psychic in "66BC" you might have known. You might also have known what would happen in Britain in 55BC & been running around yelling "The Romans are coming, the Romans are coming!"
Otherwise, 65BC is the answer to what year FOLLOWS 66BC, but as to what FOLLOWED 66BC, they obviously couldn't have even have known it was 66BC!
It depends upon which calendar the Q is based, and whether we are talking as we know it today, or as they knew it then�
Gregorian calendar 65 BC
Ab urbe condita 689
Bah�'� calendar -1908 � -1907
Buddhist calendar 480
Chinese calendar 2572/2632
Coptic calendar -348 � -347
Ethiopian calendar -72 � -71
Hebrew calendar 3696 � 3697
Hindu calendars
- Vikram Samvat -9 � -8
- Kali Yuga 3037 � 3038
Holocene calendar 9936
Iranian calendar 686 BP � 685 BP
Islamic calendar 707 BH � 706 BH
Japanese calendar
- Imperial Year Kōki 596
Julian calendar -19
Korean calendar 2269
Thai solar calendar 479
At the time, it s was more likely to have been known in many places as 689 AUC (Ab urbe condita), Latin for "from the founding of the city" (of Rome), used for calculation of dates. (Also as Anno Urbis Conditae, "in the year from the founding of the city".)