Historical clue formulations

• Like some wealthy neighborhoods — 2017-09-18
• Like some communities — 2017-02-18
• Like some communities — 2015-04-26
• Like some communities — 2009-03-08
• Like some communities — 2006-05-16
• Like some playgrounds — 2004-05-27
• Like some communities — 2001-09-29
• Like some modern communities — 2000-01-30
• Like heaven's entrance — 1998-09-25
• Protected, as an estate — 1997-01-03