I shall clarify: I am after the dates that the invasion was scheduled to take place, and when and why of each was postponement.
Allegedly there were twenty-nine postponements and while I have seen that number repeated often I have never been able to find an actual list of the postponements.
Quick Google search came up with this:
Sept 27th, Hitler orders plans for invasion with a planned date to Nov 12th. Generals complain it's to soon.
Oct. 10th Hitler orders an invasion against the low countries and France, no date set.
Nov 7th, Invasion decision postponed no reason given (weather most likely) new date set to Nov 9th.
Nov 9th, invasion decision postponed, no reason given, next date for decision Nov 13th, possible invasion Nov 19th
Nov 13th, invasion decision postponed to Nov 22nd
Nov 14th, Netherlands added to invasion.
Dec 12th, invasion decision postponed to Dec 27th
Dec 27th, invasion decision postponed to 'later date'
Jan 6th, invasion postponed to spring
Jan 10th, Date set for Jan 17th, but the (in)famous officers that got lost with papers happens. Invasion postponed indefinitely on the 13th.
May 5th, Hitler pushes the decision date for invasion to the following date
May 6th, see above
May 7th, see above
May 8th, see above
May 9th, Invasion order given.
IMO likely 20 of those 29 postponements happened in the month before the actual invasion, the rest likely due to weather and other similar issues.