6.00am (AEST) – Sydney Marathon, set on an inner-city course and finishing at the Opera House – Sydney

9.00pm (AEST) – Motorsport: F1 Azerbaijani Grand Prix – Baku, Azerbaijan, and watch on Kayo

1.00pm (AEST) – Welcome home event for Paris Paralympians and Olympians – Adelaide

4.05pm (AEST) – NRL: Elimination final, Canterbury v Manly – Sydney, and watch on Channel 9

7.00pm (AEST) – Tennis: Davis Cup group finals, Australia v Spain – Valencia, Spain, and watch on 9Now

11.30pm (AEST) – Men’s Cricket: Third T20I – Australia v England – England, and watch on Kayo

CleanUp Conference (on until 19 September) – Adelaide

World Lymphoma Awareness Day 

Start of Dementia Awareness Week (until 22 September) 

International Day of Democracy 

Independence Days for Costa Rica, El Salvador, Guatemala, Honduras and Nicaragua

World Afro Day

It’s Prince Harry’s 40th Birthday where he is set to receive a massive inheritance thanks to his late great-grandmother the Queen Mother

Anniversary of:

• the birthdays of Marco Polo (1254) and Agatha Christie (1890)
• Scottish bacteriologist Alexander Fleming discovering penicillin (1928)
• google.com being registered as a domain name (1997)
• the opening ceremony of the Sydney Olympic Games (2000)