828
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 828 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 828 DCCCXXVIII | 
| Ab urbe condita | 1581 | 
| Armenian calendar | 277 ԹՎ ՄՀԷ | 
| Assyrian calendar | 5578 | 
| Balinese saka calendar | 749–750 | 
| Bengali calendar | 234–235 | 
| Berber calendar | 1778 | 
| Buddhist calendar | 1372 | 
| Burmese calendar | 190 | 
| Byzantine calendar | 6336–6337 | 
| Chinese calendar | 丁未年 (Fire Goat) 3525 or 3318 — to — 戊申年 (Earth Monkey) 3526 or 3319 | 
| Coptic calendar | 544–545 | 
| Discordian calendar | 1994 | 
| Ethiopian calendar | 820–821 | 
| Hebrew calendar | 4588–4589 | 
| Hindu calendars | |
| - Vikram Samvat | 884–885 | 
| - Shaka Samvat | 749–750 | 
| - Kali Yuga | 3928–3929 | 
| Holocene calendar | 10828 | 
| Iranian calendar | 206–207 | 
| Islamic calendar | 212–213 | 
| Japanese calendar | Tenchō 5 (天長5年) | 
| Javanese calendar | 724–725 | 
| Julian calendar | 828 DCCCXXVIII | 
| Korean calendar | 3161 | 
| Minguo calendar | 1084 before ROC 民前1084年 | 
| Nanakshahi calendar | −640 | 
| Seleucid era | 1139/1140 AG | 
| Thai solar calendar | 1370–1371 | 
| Tibetan calendar | 阴火羊年 (female Fire-Goat) 954 or 573 or −199 — to — 阳土猴年 (male Earth-Monkey) 955 or 574 or −198 | 
Year 828 (DCCCXXVIII) was a leap year starting on Wednesday of the Julian calendar.