Get the current time in a timezone.

Date+TimeZone.swift

import Foundation

extension Date {
    /**
     Returns the current time in a timezone.

     - Note:
     `Date` is [time zone agnostic.](https://developer.apple.com/reference/foundation/date#overview)
    */
    static func `for`(zone: TimeZone) -> Date {
        let utcNow = Date()
        let cal = Calendar.current
        let flags: Set<Calendar.Component> = [.year, .month, .day, .hour, .minute, .second]
        
        var comps = cal.dateComponents(flags, from: utcNow)
        comps.second = (comps.second ?? 0) + zone.secondsFromGMT(for: utcNow)
        
        // In practice cal.date shouldn't ever be nil
        // http://stackoverflow.com/a/39376283
        return cal.date(from: comps) ?? utcNow
    }
}

LICENSE

The MIT License (MIT)

Copyright (c) 2017 Bogdan Vitoc

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.