Define a period

...

How many working days in year 1942?

Here is the detail of the calculation:

Because 1942 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1942.

Here is the list of these 10 public holidays:

1. Πρωτοχρονιά : Thursday, 1 January, 1942
2. Θεοφάνεια : Tuesday, 6 January, 1942
3. Καθαρά Δευτέρα : Monday, 16 February, 1942
4. Εικοστή Πέμπτη Μαρτίου : Wednesday, 25 March, 1942
5. Μεγάλη Παρασκευή : Friday, 3 April, 1942
6. Δευτέρα του Πάσχα : Monday, 6 April, 1942
7. Εργατική Πρωτομαγιά : Friday, 1 May, 1942
8. Δευτέρα Πεντηκοστής : Monday, 25 May, 1942
9. Ημέρα του Όχι : Wednesday, 28 October, 1942
10. Χριστούγεννα : Friday, 25 December, 1942

And here are the 4 public holidays falling on a weekend:

1. Ορθόδοξο Πάσχα : Sunday, 5 April, 1942
2. Πεντηκοστή : Sunday, 24 May, 1942
3. Κοίμηση της Θεοτόκου : Saturday, 15 August, 1942
4. Σύναξη της Θεοτόκου : Saturday, 26 December, 1942