| Millennium: | 1st millennium |
|---|---|
| Centuries: | 9th century – 10th century – 11th century |
| Decades: | 960s 970s 980s – 990s – 1000s 1010s 1020s |
| Years: | 995 996 997 – 998 – 999 1000 1001 |
| 998 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 998 CMXCVIII |
| Ab urbe condita | 1751 |
| Armenian calendar | 447 ԹՎ ՆԽԷ |
| Assyrian calendar | 5748 |
| Bahá'í calendar | -846–-845 |
| Bengali calendar | 405 |
| Berber calendar | 1948 |
| English Regnal year | N/A |
| Buddhist calendar | 1542 |
| Burmese calendar | 360 |
| Byzantine calendar | 6506–6507 |
| Chinese calendar | 丁酉年十一月三十日 (3634/3694-11-30) — to —
戊戌年十二月初十日(3635/3695-12-10) |
| Coptic calendar | 714–715 |
| Ethiopian calendar | 990–991 |
| Hebrew calendar | 4758–4759 |
| Hindu calendars | |
| - Vikram Samvat | 1054–1055 |
| - Shaka Samvat | 920–921 |
| - Kali Yuga | 4099–4100 |
| Holocene calendar | 10998 |
| Iranian calendar | 376–377 |
| Islamic calendar | 387–389 |
| Japanese calendar | |
| Korean calendar | 3331 |
| Minguo calendar | 914 before ROC 民前914年 |
| Thai solar calendar | 1541 |
Year 998 (CMXCVIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.