Dates and time

Get current date:

let date = Date()

Get current year and date

let date = Date()

    let calendar = Calendar.current

    return String(calendar.component(.year, from: date))

Get current time

 let date = Date()

    let formatter = DateFormatter()

    formatter.dateStyle = .none

    formatter.timeStyle = .medium

    let timeString = formatter.string(from: date)

Yesterday:

let yesterday = Calendar.current.date(byAdding: .day, value: -1, to: Date())

Get day of week

let todayDate = NSDate()

let dateFormatter = DateFormatter()

dateFormatter.dateFormat = "EEEE"

let dayOfWeekString = dateFormatter.string(from: todayDate as Date)

print(dayOfWeekString)

Getting the day, month and year from a date, create a new date from the components:

let dc = itemDatePicker.calendar.dateComponents([.day, .month, .year], from: itemDatePicker.date)

        (or         let dc = Calendar(identifier: .gregorian).dateComponents([.day, .month, .year], from: todaysdate)

        var dct = DateComponents()

        

        dct.day = dc.day

        

        dct.month = dc.month

        

        dct.year = dc.year

        

        let theNewDate = Calendar(identifier: .gregorian).date(from: dct)

Sorting an array by date:

allItems.sort(by: {$0.dueDateT?.compare($1.dueDateT! as Date) == .orderedDescending})

Compare dates using ==, < and >