This is an oft-repeated question and the practical answer to all such questions related to time to file an appeal is that there is no time limit! Yes, time limit does exist in law, depending on the Act in which it is defined, but applications to condone the delay to file an appeal are easily granted in most cases. This is very different from western legal systems in which the time to file an appeal is strictly adhered to and a delay by even one day automatically denies the appellate court of jurisdiction.
So, if in doubt, just simultaneously, along with the appeal, file an application to condone the delay. Litigants cook some excuse or the other and get away with it. In some cases, appeals are even accepted years after the day to appeal has expired!!!
Of course, a stitch in time saves nine. So, try to file an appeal without further delay!