Historical clue formulations

• ___ white — 2009-02-24
• Like heaven's gates — 2003-02-25
• Lustrous white — 2002-06-16
• Lustrously white — 1999-12-07
• Lustrous — 1999-07-06
• ___ Gates — 1998-09-19
• Lustrous — 1996-09-26
• Like some gates — 1994-01-25