Kalna (the railway station is called Ambika Kalna) is at a distance of 82 kms. from Howrah. But unfortunately after 2261 Mumbai Howrah Duranto Exp reaches Howrah at 19.45 (usually the train is 15 to 30 mins before time), there are no convenient connections from Howrah. There is a train leaving Sealdah at 20.05 hrs called 3163 Sealdah Saharsa Hatey Bazarey Express. It is not possible to avail this train from Sealdah. But if you take a local train from Howrah to Bandel you can reach Bandel by 9 p.m. and avail Hatey Bazarey Exp at Bandel at 21.20 hrs. This train will reach Ambika Kalna at 10 p.m.
Alternately, you can stay put at Howrah and board 219 Howrah Malda...
more... Town Pass. at 21.25 hrs and reach Ambika Kalna at 11.20 p.m. Hope I have been able to guide you adequately.