If we're talking about the 5 murders that are attributed to the Ripper they started in August 1888 until November 1888. Although most experts agree now that the Ripper had far more victims, and did not disappear after the Mary Kelly murder. So these 5 would be late summer through fall.
Reality tells us that the murders lasted at least until 1891, and I personally believe that continued until after the turn of the century.
Season 7 episode 16 it is noted, Glen Quagmire was Jack The Ripper in a past life.
Annie Chapman
Fridays
It is presumed 'Jack' used a knife.
Jack killed 30 September 1888.
Catherine Eddowes.
As far as we know - yes.Yes he did
30 Sept. 1888
A guys called Jack The Ripper
midnight
If you mean Jack the Ripper, he killed his victims with a knife, cutting the throats of women and then cutting out vital organs.
Mary Jane Kelly.