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|AD 28 by topic|
|Gregorian calendar||AD 28|
|Ab urbe condita||781|
|Balinese saka calendar||N/A|
|Chinese calendar||丁亥年 (Fire Pig)|
2724 or 2664
— to —
戊子年 (Earth Rat)
2725 or 2665
|Coptic calendar||−256 – −255|
|- Vikram Samvat||84–85|
|- Shaka Samvat||N/A|
|- Kali Yuga||3128–3129|
|Iranian calendar||594 BP – 593 BP|
|Islamic calendar||612 BH – 611 BH|
|Julian calendar||AD 28|
|Minguo calendar||1884 before ROC|
|Seleucid era||339/340 AG|
|Thai solar calendar||570–571|
154 or −227 or −999
— to —
155 or −226 or −998
AD 28 (XXVIII) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Silanus and Nerva (or, less frequently, year 781 Ab urbe condita). The denomination AD 28 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- Roman legions in Germania are transported by fleet to the fortress of Flevum on the Rhine, to operate against the rebellious Frisians.
- The Frisians negotiate a treaty with the Roman Empire at the River Rhine, avoiding conquest.
- According to the Gospel of Luke (Luke 3:1-2), the ministries of John the Baptist and Jesus began at the earliest in this year, and more likely in AD 29.
- June 15 – Ming of Han, Chinese emperor (d. AD 75)
- Julia Berenice, Jewish client queen of Judea
- Silius Italicus, Roman consul and epic poet