Hi,
I had the same situation at VFS before when I applied for my visa as it was more than 3 months away from my intended departure.. so the staff said that they wont accept it BUT then I told her that I will just edit what I've written on my form. Instead of April, I moved it back to March and then she accepted.
The 2 options were: edit the intended departure date OR come back again next time to re-apply and make sure that the date is not more than 3 months away from the date of application.. which of course, I opted for the first one.