Determination of the day of the week ISO 8601. The day designated with 7 may also be counted as "0", by applying the arithmetic modulo 7, which calculates the remainder of a number after division by 7. Thus, the number 7 is treated as 0, 8 as 1, 9 as 2, 18 as 4 and so on. If Sunday is counted as day 1, then 7 days later (i.e. day 8) is also a Sunday, and day 18 is the same as day 4, which is a Wednesday since this falls three days after Sunday. The basic approach of nearly all of the methods to calculate the
First day of school state schools in England and Wales varies by local authority and sometimes by school, but it is nearly always during the first week of September, or occasionally in the second week. The school term in Scotland begins in mid- to late-August, more than a week earlier than in the rest of the UK. The precise date varies by local authority and sometimes by school. The first day of school in Slovenia is on September 1, or the first Monday following if September 1 falls on Saturday or Sunday First day of school The first day of school is the first