I want to get day (Ex Sun, Mon, Tue, ..) from date
def date = new Date()
def day = date[Calendar.DAY_OF_MONTH]
result is 18, but i want to get Mon.
And if I have 2017-10-09T00:00:00.000, I want to get day of 2017-10-09T00:00:00.000
Could you help me please?