get the date for the first day of the current year in swift

You can get the date for the first day of the current year in Swift by using the Calendar and DateComponents classes. Here's an example code snippet:

main.swift
let calendar = Calendar.current
let currentDate = Date()
let components = calendar.dateComponents([.year], from: currentDate)
let startOfYear = calendar.date(from: components)!
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In this code snippet, we first create a Calendar instance using the current static property. Then, we create a Date instance representing the current date using the Date initializer with no arguments.

Next, we create a DateComponents instance using the .year value to specify that we only want the year component from the current date. We use the dateComponents(_:from:) method of the Calendar instance to get the desired date components.

Finally, we use the date(from:) method of the Calendar instance to create the Date instance representing the start of the year.

Note that we force unwrap the optional result of date(from:) because we know it will always produce a valid date for the input components.