Lyra-JS

lr.add("5 days") // Adds 5 days to current date
lr.add("Tuesday", "Sat, 30 Jun 2018 12:43:00") // Moves date to next Tuesday

lr.sub("5 months") // Subtracts 5 months from current date

lr.getTimeByZone("JST") // Gets current date and time in Japan

lr.convertDate("dd, mm yy", "30, June 2018")

//C onverts any date format to a valid date string or date object

lr.convertDate("mm, this is text hh@dd yy yy ss min", "07, this is text 6@3 2018 2018 13 13")

// Yes, Even Something like this

lr.dateDifference(date, date2)

// Gets the difference in years, months, days or even in hours, minutes and seconds

// And yes, leap years included

// These are just a few of the things lyra-js can do for dates