The Date helper is used for calculations with dates.
Date::difference($from, $to, $type = null)
$from, $to - from and to date in the format: YYYY-MM-DD HH:MM::SS
[y] => 0 [m] => 2 [d] => 26 [h] => 0 [i] => 0 [s] => 0 [weekday] => 0 [weekday_behavior] => 0 [first_last_day_of] => 0 [invert] => 1 [days] => 86 [special_type] => 0 [special_amount] => 0 [have_weekday_relative] => 0 [have_special_relative] => 0
to return a set item like the number of days pass d as the third parameter.
Date::businessDays($startDate, $endDate, $weekendDays = false)
Get the number of days between 2 dates, set $weekendDays to true to get the number of weekends.
Date::businessDates($startDate, $endDate, $nonWork = 6)
Get an array of dates between 2 dates (not including weekends). $nonWork day of week(int) where weekend begins - 5 = fri -> sun, 6 = sat -> sun, 7 = sunday
Date::daysInMonth($month = 0, $year = '')
Takes a month/year as input and returns the number of days for the given month/year. Takes leap years into consideration.