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How can I say today Happy birthday if my friend´s birthday is the next monday?

Hello, I'm not an english speaker, Can you help me with the correct phrase?. My friend`s birthday is the next monday, but I'm not going to see her that day, and I want to say her "Happy birthday" tomorrow. In spanish the phrase should be "Feliz cumpleaños adelantado" Could it be something like "Happy birthday Almost"?

Public Comments

1. maybe "happy early birthday"
2. I usually say 'Happy early birthday!' if the birthday is in a day or two but since her's is on Monday you can say: "Happy advanced birthday!" Hope this helped. :)
3. "Feliz cumpleaños adelantado" would be "happy birtday, in advanced"
4. i would say "Happy early birthday!"