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Events

Special days marked on this website, for September 28, 2025

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September 28 ns

September 15 os

We mark certain days of the year with ‘On This Day’ posts, recalling events associated with them.

Our events are grouped under two calendars. The Gregorian ‘New Style’ (NS) is the worldwide calendar first issued at Rome in 1582. On that calendar, today is September 28. The Julian ‘Old Style’ (OS), also issued at Rome but in 46 BC, was used in Roman Britain and then in England from Anglo-Saxon times until 1752. It is still used today by roughly 100 million Orthodox Christians worldwide. On that calendar, today is September 15.

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Today

Penicillin

An improbable chain of coincidences led to one of the great medical revolutions just when it was most needed.

Alexander Fleming (1881-1955) discovered the principle underlying antibiotics, a genuine medical revolution, and it all happened by accident. But whereas the excitable Archimedes cried ‘Eureka!’ on making his famous discovery, Scotsman Fleming muttered a more British ‘That’s funny’.

On This DayDecember 22 ns1 post

Alexander Fleming discovers penicillin (1928)

The Calendar below shows the year on the Roman (Gregorian or ‘New Style’) Calendar for 2025. Click on any date to see the events we have marked for it.

Roman Easter 2025: Sunday April 20

Old English Easter 2025: Sunday April 20

Christmas 2025: Thursday December 25

Old English Christmas 2025: Wednesday January 7, 2026