First day of school is September 11, or the first Monday following if September 11 is a Saturday or Sunday. According to a 2010 decree of Polish Minister of Public Education, the first day of school for regular compulsory education schools in Poland is on September 1 or the first following Monday if September 1 falls on Friday, Saturday or Sunday. The last day is the last Friday after 18th of June. Previously, according to a similar 2002 decree, the above exception was only for Saturday and Sunday, and the last day was the first Friday after June 18. Schools in Russia (and formerly
Date and time notation in Serbia by comma, but can be abbreviated to the first three letters, which are then capitalized (NED, 31. 12. '06) – note that in that case, the shortest date format is used. Starting day of the week is Monday, and the weekend falls on Saturday and Sunday. Weeks are rarely referred to by their order in the year, although they are always printed in large format calendars, typically the number of a week in the month is used (third week in March, instead of week 12).' One of most common errors while typing the date with the full month name is