@Iven *******
It is counting for a calendar year, but 180 days is just a bit less than half a year, 1 July 2026 till 31 December 2026 is 184 days, 1 January 2027 til 31 June 30 2027 is 181 days, so when you stay eaxactly 1 year this way, you will be taxable for 2026 and 2027.
So you have to be careful for exact dates to prevent any risk.
And as far as I could read 180 days a year is taxable, so don't stay longer than that in any calendar year.
These small differences is also a common cause for people overstaying a few days.