How to calculate between Thai year and AD
What you do is to add 543 to AD.
For instance, the year 2015 in the West is the year 2558 in Thailand.
Happy New Year = Sook San Bpee Mai
Literal translation is Sook San = happy, Bpee (Pii) = year, Mai = new. Remember that adjective comes after noun in Thai.
สุขสันต์ปีใหม่ Happy New Year from Practical Thai Learning.