Historical clue formulations

• Capital of Saudi Arabia — 2021-04-18
• Largest city on the Arabian peninsula — 2021-01-31
• Saudi capital — 2020-02-11
• World capital whose name means "gardens" — 2017-03-15
• Capital of Saudi Arabia — 2016-03-29
• Setting of King Fahd Road — 2013-05-04
• City that's home to King Fahd Road — 2010-04-11
• Oil capital — 2008-08-17
• Mideast capital — 2005-08-31
• Saudi capital — 2001-08-08