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How many working days in year 2021?
Here is the detail of the calculation:
Because 2021 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 52 sundays. It remains 261 days.
Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 254 working days in 2021.
 Here is the list of these 7 public holidays: 
 
 1. Uusaasta : Friday, 1 January, 2021 
2. Iseseisvuspäev : Wednesday, 24 February, 2021 
3. Suur Reede : Friday, 2 April, 2021 
4. Võidupüha : Wednesday, 23 June, 2021 
5. Jaanipäev : Thursday, 24 June, 2021 
6. Taasiseseisvumispäev : Friday, 20 August, 2021 
7. Jõululaupäev : Friday, 24 December, 2021 
And here are the 5 public holidays falling on a weekend:
1. Ülestõusmispühad : Sunday, 4 April, 2021 
2. Kevadpüha : Saturday, 1 May, 2021 
3. Nelipühad : Sunday, 23 May, 2021 
4. Esimene jõulupüha : Saturday, 25 December, 2021 
5. Teine jõulupüha : Sunday, 26 December, 2021