Book  (Apr 1993)  Page(s) 233.  
 
Happy Days Hybrid Tea, geranium-red, 1932, 'Briarcliff' sport; Amling, M.C. Description.

Book  (1958)  Page(s) 149.  
 
Happy Days. HT. (M. C. Amling; int. Amling Co., '32.) Briarcliff sport. Bud pointed; fl. large, dbl., open, geranium-red; long stem. Fol. dark. Very vig. (28). Pl. Pat. 144 (expired).

Book  (1936)  Page(s) 196.  
 
Days, Happy (HT) Ameling 1936; geranium-red to lake-red, large, double, open, floriferous, growth 7/10.