Formal:
* ਸ਼ੁਭ ਜਨਮ ਦਿਨ (Shubh Janam Din) - This is the most common and formal way to say "happy birthday."
* ਜਨਮ ਦਿਨ ਮੁਬਾਰਕ (Janam Din Mubarak) - This is another formal way to say "happy birthday" which literally means "blessed birthday."
Informal:
* ਜਨਮ ਦਿਨ ਦੀਆਂ ਮੁਬਾਰਕਾਂ (Janam Din Diyan Mubarakaan) - This is a more informal and friendly way to say "happy birthday."
* ਬਰਥਡੇ ਮੁਬਾਰਕ (Birthdae Mubarak) - This is a more casual and modern way to say "happy birthday."
Other variations:
* ਜਨਮ ਦਿਨ ਵਾਲੀਆਂ ਮੁਬਾਰਕਾਂ (Janam Din Waliyan Mubarakaan) - This is a more poetic way to say "happy birthday" that emphasizes the specialness of the day.
Remember that pronunciation can vary slightly depending on the region. You can use online resources or ask a native Punjabi speaker for help with pronunciation.