Fewer working days resulted in a slowdown in imports, exports and manufacturing in February, the Bank of Thailand reported on Friday.
Even so, the economic growth momentum in February was sustained if the holidays factor was excluded, building on January's momentum, Mathee Supapongse, the central bank's senior director for monetary policy, said.
Exports and imports shrank 4.6% and 8.9 % respectively in February, compared to the same period last year.
"The fact that February this year had both the Chinese New Year and Maka Bucha holidays resulted in fewer working days than other months, and a subsequent deceleration in the overall economy.
"However, average economic growth in January and February was pretty strong," Mr Mathee said.
Thailand had a $1.5 billion current account surplus in February, the central bank's economic report as of February showed.