1409
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
June 26: Council of Pisa crowns a third Pope, Alexander V, to rival Pope Gregory XIII and Rome's Pope Benedict XIII and Avignon's Pope Benedict XIII
| 1409 by topic | 
|---|
| Arts and science | 
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1409 in poetry | 
| Gregorian calendar | 1409 MCDIX | 
| Ab urbe condita | 2162 | 
| Armenian calendar | 858 ԹՎ ՊԾԸ | 
| Assyrian calendar | 6159 | 
| Balinese saka calendar | 1330–1331 | 
| Bengali calendar | 815–816 | 
| Berber calendar | 2359 | 
| English Regnal year | 10 Hen. 4 – 11 Hen. 4 | 
| Buddhist calendar | 1953 | 
| Burmese calendar | 771 | 
| Byzantine calendar | 6917–6918 | 
| Chinese calendar | 戊子年 (Earth Rat) 4106 or 3899 — to — 己丑年 (Earth Ox) 4107 or 3900 | 
| Coptic calendar | 1125–1126 | 
| Discordian calendar | 2575 | 
| Ethiopian calendar | 1401–1402 | 
| Hebrew calendar | 5169–5170 | 
| Hindu calendars | |
| - Vikram Samvat | 1465–1466 | 
| - Shaka Samvat | 1330–1331 | 
| - Kali Yuga | 4509–4510 | 
| Holocene calendar | 11409 | 
| Igbo calendar | 409–410 | 
| Iranian calendar | 787–788 | 
| Islamic calendar | 811–812 | 
| Japanese calendar | Ōei 16 (応永16年) | 
| Javanese calendar | 1323–1324 | 
| Julian calendar | 1409 MCDIX | 
| Korean calendar | 3742 | 
| Minguo calendar | 503 before ROC 民前503年 | 
| Nanakshahi calendar | −59 | 
| Thai solar calendar | 1951–1952 | 
| Tibetan calendar | 阳土鼠年 (male Earth-Rat) 1535 or 1154 or 382 — to — 阴土牛年 (female Earth-Ox) 1536 or 1155 or 383 | 
Year 1409 (MCDIX) was a common year starting on Tuesday of the Julian calendar.