A date in every calendar
April 12, 1955
Tuesday
Jonas Salk's polio vaccine was announced safe and effective, a turning point against a disease that had paralysed hundreds of thousands.
April 12, 1955 across 14 calendars
| Gregorian Solar | April 12, 1955 |
| Hebrew Lunisolar | 20 Nisan 5715 |
| Islamic (Umm al-Qura) Lunar | Shaʻban 19, 1374 AH |
| Islamic (tabular civil) Lunar | Shaʻban 19, 1374 AH |
| Persian (Solar Hijri) Solar | Farvardin 22, 1334 AP |
| Indian National Solar | Chaitra 22, 1877 Śaka |
| Chinese Lunisolar | Third Month 20, 1955(yi-wei) |
| Korean (Dangi) Lunisolar | Third Month 20, 1955(yi-wei) |
| Japanese (regnal) Solar | April 12, 30 Shōwa |
| Buddhist (Thai) Solar | April 12, 2498 BE |
| Republic of China (Minguo) Solar | April 12, 44 Minguo |
| Coptic Solar | Baramouda 4, 1671 AM |
| Ethiopian Solar | Miazia 4, 1947 AM |
| Ethiopian (Amete Alem) Solar | Miazia 4, 7447 AA |
Conversions use the proleptic Gregorian calendar as the pivot. All systems render the same physical day — a Tuesday.