South Korea's exports up 21.9% y/y in the first 10 days of March (there is a but …)

Yonhap reporting citing customs data

exports up 21.9% from the same period last year

• daily average-2.5 % y/y
• customs office noted the number of working days over the cited period came to 7.5 this year, compared with 6 last year

Imports +14.2% y/y

I bolded the working days part … sort of takes the shine off the +21.9%, no?