Aug 20th 1864 I do believe.
As to parents... if we go right back to my very first post, 'lo those many days ago

, I found Frederick COOPER the verger born about 1819 in Marylebone....
1841 Census England Middlesex St Marylebone Christchurch
HO107/677/30/52
New Street
COOPER
John 65 Coachman born in County
Elizabeth 45 not born in County
Frederick 22 Porh squiggle Psquiggle born in Counthy
Caroline 20 Milliner born in County
Ann 16 Milliner born in County
Harriet 15 Wood Engraver? born in County
Karenlee