50 (Roman numerals: L) is a common year of the Gregorian calendar. It started on a Saturday. It was a common year starting on Thursday of the Julian calendar. The Gregorian calendar was not in use at the time of the common year starting on Saturday and ending on Saturday.

Millennium: 1st millennium
Centuries: 1st century BC1st century2nd century
Decades: 20s  30s  40s  – 50s –  60s  70s  80s
Years: 47 48 495051 52 53
AD 50 in other calendars
Gregorian calendarAD 50
Ab urbe condita803
Assyrian calendar4800
Balinese saka calendarN/A
Bengali calendar−543
Berber calendar1000
Buddhist calendar594
Burmese calendar−588
Byzantine calendar5558–5559
Chinese calendar己酉(Earth Rooster)
2746 or 2686
    — to —
庚戌年 (Metal Dog)
2747 or 2687
Coptic calendar−234 – −233
Discordian calendar1216
Ethiopian calendar42–43
Hebrew calendar3810–3811
Hindu calendars
 - Vikram Samvat106–107
 - Shaka SamvatN/A
 - Kali Yuga3150–3151
Holocene calendar10050
Iranian calendar572 BP – 571 BP
Islamic calendar590 BH – 589 BH
Javanese calendarN/A
Julian calendarAD 50
Korean calendar2383
Minguo calendar1862 before ROC
Nanakshahi calendar−1418
Seleucid era361/362 AG
Thai solar calendar592–593
Tibetan calendar阴土鸡年
(female Earth-Rooster)
176 or −205 or −977
    — to —
(male Iron-Dog)
177 or −204 or −976

It is one of only seven years to use just one Roman numeral. The seven are 1 AD (I), 5 AD (V), 10 AD (X), 50 AD (L), 100 AD (C), 500 AD (D), and 1000 AD (M).