ISO 8601 uses 7 for Sundays. 1 - First day of week is Monday and the first week of the year has more than 3 days. The abs() function returns the absolute (positive) value of a number. To show trends, the table below shows the change in average new cases per day in each state, week over week for the last 28 days. The PHP mktime() function returns the Unix timestamp for a date. Returns timestamp for first day of week (for me Monday) - "yyyy-Www-d", where yyyy is 4-digit year, W is literal, ww is 2-digit weeknumber and dd is day of week (1 for Monday, 7 for Sunday) PHP. If you omit the second argument, it returns the current date/time in the given format. Optional. Just use the powerful date() function that takes a format string and an optional unix timestamp as arguments. Anzeige. Doomsday Calculator – Calculate the weekday of any date in your Head; Week Number Calculator – Find the week number for any date; Date Calculator – Add or subtract days, months, years; Add to or subtract from a date and time; Duration Between Two Dates – Calculates number of days. Whereas, most western calendars display Sunday as the first day of the week and Saturday as the last day of the week. Date Calculators. $dow = ($julianday % … echo $date . ' 1 - Returns the weekday as a string (Sunday, Monday, etc.) DAYOFWEEK () function MySQL DAYOFWEEK () returns the week day number (1 for Sunday,2 for Monday …… 7 for Saturday) for a date specified as argument. In the ISO week numbering system, week 1 is the week containing the first Thursday of the year. fell on a ' . Definition and Usage. mode is an optional argument that determines the logic of week number calculation. The computer stores dates and times in a format called UNIX Timestamp, which measures time as a number of seconds since the beginning of the Unix epoch (midnight Greenwich Mean Time on January 1, 1970 i.e. $date = "2012-01-21"; //Get the day of the week using PHP's date function. The PHP Date() Function.