延えん久きゅうえんきゅうMeanings1nounEnkyū era (1069-1074)Japanese era name (年号) spanning from April 13, 1069 to August 23, 1074 in the Gregorian calendar.延えん久きゅうは平へい安あん時じ代だい後こう期きの元げん号ごうの一ひとつです。Enkyū is one of the era names of the late Heian period.