How many days gap is there between rock band competition and group song competition?

From the given information: Date for competition from 19th October to 26th October (From Wednesday to Wednesday)
From (v), no competition was held on 20th and 23rd (i.e on Thursday & Sunday) From (vi), Street play was held on 24th.
From (iii) and (vii), Debate must have been held on 22nd, Flash-P on 21st and Group song on 25th.
From (ii), Rock-band was held on 19th. Hence , Five days gap is there between rock band competition and group song competition .
From this we can draw following result :-