Historical clue formulations

• Willingly, once — 2015-10-17
• Gladly, old-style — 2015-08-30
• "April Love" composer Sammy — 2014-04-09
• Willing — 2012-03-21
• Gladly, old-style — 2011-11-25
• "April Love" composer Sammy — 2006-08-17
• Willingly — 2002-09-01
• Gladly — 2001-10-20
• Gladly — 2000-11-22
• Gladly, in olden times — 1994-06-19