1678

1678 (MDCLXXVIII) was a common year starting on Saturday of the Gregorian calendar and a common year starting on Tuesday of the Julian calendar, the 1678th year of the Common Era (CE) and Anno Domini (AD) designations, the 678th year of the 2nd millennium, the 78th year of the 17th century, and the 9th year of the 1670s decade. As of the start of 1678, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.

Millennium:	2nd millennium
Centuries:	16th century – 17th century – 18th century
Decades:	1640s  1650s  1660s  – 1670s –  1680s  1690s  1700s
Years:	1675 1676 1677 – 1678 – 1679 1680 1681

1678 in other calendars

Gregorian calendar	1678 MDCLXXVIII
Ab urbe condita	2431
Armenian calendar	1127 ԹՎ ՌՃԻԷ
Assyrian calendar	6428
Balinese saka calendar	1599–1600
Bengali calendar	1085
Berber calendar	2628
English Regnal year	29 Cha. 2 – 30 Cha. 2
Buddhist calendar	2222
Burmese calendar	1040
Byzantine calendar	7186–7187
Chinese calendar	丁巳年 (Fire Snake) 4374 or 4314     — to — 戊午年 (Earth Horse) 4375 or 4315
Coptic calendar	1394–1395
Discordian calendar	2844
Ethiopian calendar	1670–1671
Hebrew calendar	5438–5439
Hindu calendars
- Vikram Samvat	1734–1735
- Shaka Samvat	1599–1600
- Kali Yuga	4778–4779
Holocene calendar	11678
Igbo calendar	678–679
Iranian calendar	1056–1057
Islamic calendar	1088–1089
Japanese calendar	Enpō 6 (延宝６年)
Javanese calendar	1600–1601
Julian calendar	Gregorian minus 10 days
Korean calendar	4011
Minguo calendar	234 before ROC 民前234年
Nanakshahi calendar	210
Thai solar calendar	2220–2221
Tibetan calendar	阴火蛇年 (female Fire-Snake) 1804 or 1423 or 651     — to — 阳土马年 (male Earth-Horse) 1805 or 1424 or 652

Events

• January 27 – The first fire engine company in what will become the United States goes into service.
• February 18 – John Bunyan publishes his Christian allegory The Pilgrim's Progress in London.