Usually said on your birthday. It is someone wishing you a long and happy life.
"Many Happy Returns" would be a somewhat silly response to "Happy New Year." The full phrase is "Many Happy Returns of the Day," and it's usually said to someone on their birthday (where it basically means "I hope you live a long time and all your birthdays are happy") or anniversary (meaning "I wish you a long and happy marriage").
Happy Birthday
The duration of Many Happy Returns - TV series - is 1800.0 seconds.
Many Happy Returns - 1913 is rated/received certificates of: UK:U
Many Happy Returns - 1916 is rated/received certificates of: UK:U
many more happy returns of the day putina roju shubakankashalu i speak telugu so i know
Many Happy Returns - TV series - ended on 1965-04-12.
Many Happy Returns - TV series - was created on 1964-09-21.
Intha Naal meendum meendum Ungalathu vaalkkaiyil Uthikka enathu Nal Vaazththukkal.
Many Happy Returns - 1986 TV is rated/received certificates of: Iceland:L UK:PG
The cast of Many Happy Returns - 1913 includes: Harry Buss as Father Josef
Please translate 'Many Many Happy returns of the day' to Konkani