Board Thread:New on Hayate The Combat Butler Wiki/@comment-49.144.255.248-20130504063616/@comment-3445779-20130504071715

Well, I cannot tell "exactly" when the manga will end, but it was mentioned close to a year and a half ago that the series is about 60% done and if my memory serves me correctly, the author, Kenjiro Hata did mention on occasion that his plan for the series was to go all the way till Maria's birthday (December 24th) and right now in the manga timeline its about mid-late July (which took roughly over eight years to reach). So if you want a quick estimate I'd say at least a good 3-4 years pending how far Hata stretches his current and future arcs.