1423
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1423 by topic | 
|---|
| Arts and science | 
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1423 in poetry | 
| Gregorian calendar | 1423 MCDXXIII | 
| Ab urbe condita | 2176 | 
| Armenian calendar | 872 ԹՎ ՊՀԲ | 
| Assyrian calendar | 6173 | 
| Balinese saka calendar | 1344–1345 | 
| Bengali calendar | 829–830 | 
| Berber calendar | 2373 | 
| English Regnal year | 1 Hen. 6 – 2 Hen. 6 | 
| Buddhist calendar | 1967 | 
| Burmese calendar | 785 | 
| Byzantine calendar | 6931–6932 | 
| Chinese calendar | 壬寅年 (Water Tiger) 4120 or 3913 — to — 癸卯年 (Water Rabbit) 4121 or 3914 | 
| Coptic calendar | 1139–1140 | 
| Discordian calendar | 2589 | 
| Ethiopian calendar | 1415–1416 | 
| Hebrew calendar | 5183–5184 | 
| Hindu calendars | |
| - Vikram Samvat | 1479–1480 | 
| - Shaka Samvat | 1344–1345 | 
| - Kali Yuga | 4523–4524 | 
| Holocene calendar | 11423 | 
| Igbo calendar | 423–424 | 
| Iranian calendar | 801–802 | 
| Islamic calendar | 826–827 | 
| Japanese calendar | Ōei 30 (応永30年) | 
| Javanese calendar | 1337–1338 | 
| Julian calendar | 1423 MCDXXIII | 
| Korean calendar | 3756 | 
| Minguo calendar | 489 before ROC 民前489年 | 
| Nanakshahi calendar | −45 | 
| Thai solar calendar | 1965–1966 | 
| Tibetan calendar | 阳水虎年 (male Water-Tiger) 1549 or 1168 or 396 — to — 阴水兔年 (female Water-Rabbit) 1550 or 1169 or 397 | 
Year 1423 (MCDXXIII) was a common year starting on Friday of the Julian calendar.