Historical clue formulations

• Like four-leaf clovers, supposedly — 2017-01-16
• Like lottery winners — 2014-12-15
• Like the number 8, to the Chinese — 2014-08-20
• Like a rabbit's foot or four-leaf clover — 2009-11-16
• One falling into good fortune — 2009-07-23
• Like a rabbit's foot, supposedly — 2005-01-17
• Like a four-leaf clover — 2001-02-12