AD 99 was a year in the Julian calendar. It started on a Tuesday. It was not a leap-year.

Millennium: 1st millennium
Centuries: 1st century BC1st century2nd century
Decades: 60s  70s  80s  – 90s –  100s  110s  120s
Years: 96 97 9899100 101 102
AD 99 in other calendars
Gregorian calendarAD 99
Ab urbe condita852
Assyrian calendar4849
Balinese saka calendar20–21
Bengali calendar−494
Berber calendar1049
Buddhist calendar643
Burmese calendar−539
Byzantine calendar5607–5608
Chinese calendar戊戌(Earth Dog)
2795 or 2735
    — to —
己亥年 (Earth Pig)
2796 or 2736
Coptic calendar−185 – −184
Discordian calendar1265
Ethiopian calendar91–92
Hebrew calendar3859–3860
Hindu calendars
 - Vikram Samvat155–156
 - Shaka Samvat20–21
 - Kali Yuga3199–3200
Holocene calendar10099
Iranian calendar523 BP – 522 BP
Islamic calendar539 BH – 538 BH
Javanese calendarN/A
Julian calendarAD 99
Korean calendar2432
Minguo calendar1813 before ROC
Nanakshahi calendar−1369
Seleucid era410/411 AG
Thai solar calendar641–642
Tibetan calendar阳土狗年
(male Earth-Dog)
225 or −156 or −928
    — to —
(female Earth-Pig)
226 or −155 or −927


  • Mirrors made of glass backed with a sheet of tin replace mirrors made only out of metal.
  • Kushan king Kanishka, who was king when his kingdom was most powerful, sends messengers to Rome to plan a surprise attack against Parthia.