Pick any month, week or day of the year and my Geraniums, Begonias and/or misnamed Christmas Cactus are in bloom! I look for the reasons and I really don't have an answer. It is not the sun and the window they are in because some are in the east, a few in the north and a load in the south.
I thought it might be the temperature in the apartment which would explain, maybe, the Christmas Cactus blooming all year round as I do keep it cool--though some may call it cold! Still that doesn't explain the blooming Geraniums and Begonias or the yellow blooms of the Cuban plant. It might explain the green peppers growing as they need temperatures between 60 & 90 greens, though it is never 90 degrees inside my apartment yet it could be the sun shining through.
The only problem I have are getting Poinsettias to bloom after they lose their red leaves ('blossoms'). Every December I buy two of them and though they last all year they never get red bracts again but I will try again this year.
Meanwhile I will just enjoy the blooms I see every day inside my apartment! (If you look you will see a new pepper forming on the plant in the first picture.)