This change may have been done to accomodate the new Pune-Howrah Duronto express which will share the same timings as this train.
Timings of the Pune Duronto as announced by CR is
New AC Bi-Weekly Duranto Express between Pune and Howrah
2221 Express will leave Pune on every Mon & Sat at 3.15 pm and arrive Howrah at 7.40 pm
next...
more... day. 2222 Express will leave Howrah on every Thu & Sat at 8.20 am and arrive Pune
at 11.35 am next day. There is no commercial stoppage for this train.