| Years |
|---|
| Millennium |
| 2nd millennium |
| Centuries |
| Decades |
| Years |
| 1742 by topic |
|---|
| Arts, history, and science |
| Countries |
|
|
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 1742 MDCCXLII |
| Ab urbe condita | 2495 |
| Armenian calendar | 1191 ԹՎ ՌՃՂԱ |
| Assyrian calendar | 6492 |
| Balinese saka calendar | 1663–1664 |
| Bengali calendar | 1149 |
| Berber calendar | 2692 |
| British Regnal year | 15 Geo. 2 – 16 Geo. 2 |
| Buddhist calendar | 2286 |
| Burmese calendar | 1104 |
| Byzantine calendar | 7250–7251 |
| Chinese calendar | 辛酉年 (Metal Rooster) 4438 or 4378 — to — 壬戌年 (Water Dog) 4439 or 4379 |
| Coptic calendar | 1458–1459 |
| Discordian calendar | 2908 |
| Ethiopian calendar | 1734–1735 |
| Hebrew calendar | 5502–5503 |
| Hindu calendars | |
| - Vikram Samvat | 1798–1799 |
| - Shaka Samvat | 1663–1664 |
| - Kali Yuga | 4842–4843 |
| Holocene calendar | 11742 |
| Igbo calendar | 742–743 |
| Iranian calendar | 1120–1121 |
| Islamic calendar | 1154–1155 |
| Japanese calendar | Kanpō 2 (寛保2年) |
| Javanese calendar | 1666–1667 |
| Julian calendar | Gregorian minus 11 days |
| Korean calendar | 4075 |
| Minguo calendar | 170 before ROC 民前170年 |
| Nanakshahi calendar | 274 |
| Thai solar calendar | 2284–2285 |
| Tibetan calendar | ལྕགས་མོ་བྱ་ལོ་ (female Iron-Bird) 1868 or 1487 or 715 — to — ཆུ་ཕོ་ཁྱི་ལོ་ (male Water-Dog) 1869 or 1488 or 716 |
1742 (MDCCXLII) was a common year starting on Monday in the Gregorian calendar and a common year starting on Friday in the Julian calendar.