England Women ran in three tries and kept another clean sheet as they eased past Italy 23-0 at Twickenham to keep their hopes of a Grand Slam alive.
Day claimed the first of England's three tries
They only managed one penalty in the opening quarter before captain Sue Day went over in the left-hand corner for the opening try.
Full-back Charlotte Barras extended the lead just before Italy captain Maria Cristina Sanfilippo was sin-binned.
Danielle Waterman added a third in the second half, converted by Karen Andrew.
England Women: C Barras (Saracens), S Day (c) Wasps) , C Allan (Saracens), R Burford (Saracens), D Waterman (Clifton); K Andrew (Saracens), S Appleby (Clifton); S Hemming (Clifton), A Garnett (Saracens), K Storie (Blaydon), T Taylor (Thirsk), J McGilchrist (Wasps), G Stevens (Clifton), M Alphonsi (Saracens), C Spencer (Worcester).
Replacements: E Layland (Richmond), V Gray (Wasps), S Beale (Leos), S Hunter (Lichfield), K McLean (Thirsk), M Staniford (Wasps), A Penrith (Cardiff Quins).
England's remaining Six Nations fixtures:
10 Feb: v Italy, 1615 GMT (Twickenham)
26 Feb: v Ireland, 1400 GMT (Thomond Park, Limerick)
11 Mar v France, 1345 GMT (Old Albanians RFC)
17 Mar: v Wales, 1430 GMT (Taffs Wells RFC)