A date in every calendar
September 28, 1928
Friday
Alexander Fleming noticed that a Penicillium mould killed bacteria — the accidental start of the antibiotic age.
September 28, 1928 across 14 calendars
| Gregorian Solar | September 28, 1928 |
| Hebrew Lunisolar | 14 Tishri 5689 |
| Islamic (Umm al-Qura) Lunar | Rabiʻ II 14, 1347 AH |
| Islamic (tabular civil) Lunar | Rabiʻ II 12, 1347 AH |
| Persian (Solar Hijri) Solar | Mehr 6, 1307 AP |
| Indian National Solar | Asvina 6, 1850 Śaka |
| Chinese Lunisolar | Eighth Month 15, 1928(wu-chen) |
| Korean (Dangi) Lunisolar | Eighth Month 15, 1928(wu-chen) |
| Japanese (regnal) Solar | September 28, 3 Shōwa |
| Buddhist (Thai) Solar | September 28, 2471 BE |
| Republic of China (Minguo) Solar | September 28, 17 Minguo |
| Coptic Solar | Tout 18, 1645 AM |
| Ethiopian Solar | Meskerem 18, 1921 AM |
| Ethiopian (Amete Alem) Solar | Meskerem 18, 7421 AA |
Conversions use the proleptic Gregorian calendar as the pivot. All systems render the same physical day — a Friday.