| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 19th century – 20th century – 21st century |
| Decades: | 1880s 1890s 1900s – 1910s – 1920s 1930s 1940s |
| Years: | 1912 1913 1914 – 1915 – 1916 1917 1918 |
| Gregorian calendar | 1915 MCMXV |
| Ab urbe condita | 2668 |
| Armenian calendar | 1364 ԹՎ ՌՅԿԴ |
| Assyrian calendar | 6665 |
| Bahá'í calendar | 71–72 |
| Balinese saka calendar | 1836–1837 |
| Bengali calendar | 1322 |
| Berber calendar | 2865 |
| British Regnal year | 5 Geo. 5 – 6 Geo. 5 |
| Buddhist calendar | 2459 |
| Burmese calendar | 1277 |
| Byzantine calendar | 7423–7424 |
| Chinese calendar | 甲寅年 (Wood Tiger) 4611 or 4551 — to — 乙卯年 (Wood Rabbit) 4612 or 4552 |
| Coptic calendar | 1631–1632 |
| Discordian calendar | 3081 |
| Ethiopian calendar | 1907–1908 |
| Hebrew calendar | 5675–5676 |
| Hindu calendars | |
| - Vikram Samvat | 1971–1972 |
| - Shaka Samvat | 1836–1837 |
| - Kali Yuga | 5015–5016 |
| Holocene calendar | 11915 |
| Igbo calendar | 915–916 |
| Iranian calendar | 1293–1294 |
| Islamic calendar | 1333–1334 |
| Japanese calendar | Taishō 4 (大正４年) |
| Javanese calendar | 1845–1846 |
| Juche calendar | 4 |
| Julian calendar | Gregorian minus 13 days |
| Korean calendar | 4248 |
| Minguo calendar | ROC 4 民國4年 |
| Nanakshahi calendar | 447 |
| Thai solar calendar | 2457–2458 |
| Tibetan calendar | 阳木虎年 (male Wood-Tiger) 2041 or 1660 or 888 — to — 阴木兔年 (female Wood-Rabbit) 2042 or 1661 or 889 |
1915 (MCMXV) was a common year starting on Friday in the Gregorian calendar and a common year starting on Thursday in the Julian calendar.