"reasonable dates" is a correct and usable phrase in written English.
It is commonly used in legal, business, and formal contexts to refer to dates that are considered appropriate or fair. Example: The contract stipulates that the project must be completed within a reasonable date, which has been defined as no later than June 30th.
All you ever requested was "a reasonable date" after your completion.
The British chiefs of staff, spurred by Churchill, had proposed October 7 , 1942 as the target date for the operation, but U.S. planners recommended November 7 as "the earliest reasonable date for landing of the forces based on availability of combat loaders".
The truth is most Scots now expect a referendum in 2014 – the Unionist parties (Lib Dem and Labour) have begun lengthy internal processes to formulate new devolution policy, which makes 2014 a pretty reasonable date for them too.
He has freed dozens of political prisoners and promised the release of others; he has courted dialogue with civilians and announced a reasonable date, May 29th next year, for the army to hand over to an elected government.
"It is imperative that the three leaders work diligently and collectively to arrive at a final conclusion in a process that has already been prolonged beyond a reasonable date of closure," Frank G. Zarb, the chairman of the state board, said in a terse letter to Mr. Gulotta, Judith A. Jacobs, the Democratic presiding officer, and Peter J. Schmitt, the Republican minority leader.
We're even going to require that automobiles in California after a reasonable date can be whatever color you want, but they have to be cool colors.
Even if you go back before that, my strategy has always been to build a road map early on and work backward from some reasonable date that is achievable.
This also caps off months of speculation around when we would see the first preview of Windows, though the first day of Build always seemed like a reasonable date.
Commit yourself to a reasonable date sometime in the future.
Now it's time to move it back to a reasonable date and not have the height of the election season be the three months of winter making it even harder for non-incumbents to reach voters.
