1# Python timestamp conversion
2import datetime
3
4def convert_unix_timestamp(timestamp, use_12hour=False):
5    # Convert Unix timestamp to datetime object
6    date = datetime.datetime.fromtimestamp(timestamp)
7    
8    # Format the date string
9    if use_12hour:
10        format_string = "%A, %B %d, %Y %I:%M:%S %p"  # 12-hour format with AM/PM
11    else:
12        format_string = "%A, %B %d, %Y %H:%M:%S"     # 24-hour format
13    
14    return date.strftime(format_string)
15
16# Example usage
17timestamp = 1609459200  # January 1, 2021 00:00:00 UTC
18print(convert_unix_timestamp(timestamp, False))  # 24-hour format
19print(convert_unix_timestamp(timestamp, True))   # 12-hour format
20

1<?php
2// PHP timestamp conversion
3function convertUnixTimestamp($timestamp, $use12Hour = false) {
4    // Format string
5    $formatString = $use12Hour 
6        ? 'l, F j, Y g:i:s A'  // 12-hour format with AM/PM
7        : 'l, F j, Y H:i:s';   // 24-hour format
8    
9    // Convert and format the date
10    return date($formatString, $timestamp);
11}
12
13// Example usage
14$timestamp = 1609459200; // January 1, 2021 00:00:00 UTC
15echo convertUnixTimestamp($timestamp, false) . "\n"; // 24-hour format
16echo convertUnixTimestamp($timestamp, true) . "\n";  // 12-hour format
17?>
18

1// Java timestamp conversion
2import java.time.Instant;
3import java.time.LocalDateTime;
4import java.time.ZoneId;
5import java.time.format.DateTimeFormatter;
6
7public class UnixTimestampConverter {
8    public static String convertUnixTimestamp(long timestamp, boolean use12Hour) {
9        // Convert Unix timestamp to Instant, then to LocalDateTime
10        Instant instant = Instant.ofEpochSecond(timestamp);
11        LocalDateTime dateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
12        
13        // Create formatter based on desired format
14        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(
15            use12Hour ? "EEEE, MMMM d, yyyy h:mm:ss a" : "EEEE, MMMM d, yyyy HH:mm:ss"
16        );
17        
18        // Format the date
19        return dateTime.format(formatter);
20    }
21    
22    public static void main(String[] args) {
23        long timestamp = 1609459200; // January 1, 2021 00:00:00 UTC
24        System.out.println(convertUnixTimestamp(timestamp, false)); // 24-hour format
25        System.out.println(convertUnixTimestamp(timestamp, true));  // 12-hour format
26    }
27}
28

1// C# timestamp conversion
2using System;
3
4class UnixTimestampConverter
5{
6    public static string ConvertUnixTimestamp(long timestamp, bool use12Hour)
7    {
8        // Convert Unix timestamp to DateTime
9        // Unix timestamp is seconds since 1970-01-01
10        DateTime dateTime = DateTimeOffset.FromUnixTimeSeconds(timestamp).DateTime;
11        
12        // Format string based on 12-hour or 24-hour preference
13        string formatString = use12Hour 
14            ? "dddd, MMMM d, yyyy h:mm:ss tt"  // 12-hour format with AM/PM
15            : "dddd, MMMM d, yyyy HH:mm:ss";   // 24-hour format
16        
17        // Return formatted date string
18        return dateTime.ToString(formatString);
19    }
20    
21    static void Main()
22    {
23        long timestamp = 1609459200; // January 1, 2021 00:00:00 UTC
24        Console.WriteLine(ConvertUnixTimestamp(timestamp, false)); // 24-hour format
25        Console.WriteLine(ConvertUnixTimestamp(timestamp, true));  // 12-hour format
26    }
27}
28

1# Ruby timestamp conversion
2require 'time'
3
4def convert_unix_timestamp(timestamp, use_12hour = false)
5  # Convert Unix timestamp to Time object
6  time = Time.at(timestamp)
7  
8  # Format based on 12-hour or 24-hour preference
9  if use_12hour
10    time.strftime("%A, %B %d, %Y %I:%M:%S %p")  # 12-hour format with AM/PM
11  else
12    time.strftime("%A, %B %d, %Y %H:%M:%S")     # 24-hour format
13  end
14end
15
16# Example usage
17timestamp = 1609459200  # January 1, 2021 00:00:00 UTC
18puts convert_unix_timestamp(timestamp, false)  # 24-hour format
19puts convert_unix_timestamp(timestamp, true)   # 12-hour format
20

1// Go timestamp conversion
2package main
3
4import (
5    "fmt"
6    "time"
7)
8
9func convertUnixTimestamp(timestamp int64, use12Hour bool) string {
10    // Convert Unix timestamp to Time
11    t := time.Unix(timestamp, 0)
12    
13    // Format string based on 12-hour or 24-hour preference
14    formatString := "Monday, January 2, 2006 "
15    if use12Hour {
16        formatString += "3:04:05 PM"  // 12-hour format with AM/PM
17    } else {
18        formatString += "15:04:05"    // 24-hour format
19    }
20    
21    // Return formatted time
22    return t.Format(formatString)
23}
24
25func main() {
26    timestamp := int64(1609459200) // January 1, 2021 00:00:00 UTC
27    fmt.Println(convertUnixTimestamp(timestamp, false)) // 24-hour format
28    fmt.Println(convertUnixTimestamp(timestamp, true))  // 12-hour format
29}
30

1// Swift timestamp conversion
2import Foundation
3
4func convertUnixTimestamp(_ timestamp: Int, use12Hour: Bool) -> String {
5    // Create Date from Unix timestamp
6    let date = Date(timeIntervalSince1970: TimeInterval(timestamp))
7    
8    // Create DateFormatter
9    let formatter = DateFormatter()
10    formatter.dateStyle = .full
11    
12    // Set time style based on 12-hour or 24-hour preference
13    if use12Hour {
14        formatter.timeStyle = .medium
15        formatter.amSymbol = "AM"
16        formatter.pmSymbol = "PM"
17    } else {
18        formatter.timeStyle = .medium
19        formatter.dateFormat = formatter.dateFormat?.replacingOccurrences(of: "h:mm:ss a", with: "HH:mm:ss")
20    }
21    
22    // Return formatted date
23    return formatter.string(from: date)
24}
25
26// Example usage
27let timestamp = 1609459200 // January 1, 2021 00:00:00 UTC
28print(convertUnixTimestamp(timestamp, use12Hour: false)) // 24-hour format
29print(convertUnixTimestamp(timestamp, use12Hour: true))  // 12-hour format
30

1# R timestamp conversion
2convert_unix_timestamp <- function(timestamp, use_12hour = FALSE) {
3  # Convert Unix timestamp to POSIXct datetime
4  date_time <- as.POSIXct(timestamp, origin = "1970-01-01", tz = "UTC")
5  
6  # Format based on 12-hour or 24-hour preference
7  if (use_12hour) {
8    format_string <- "%A, %B %d, %Y %I:%M:%S %p"  # 12-hour format with AM/PM
9  } else {
10    format_string <- "%A, %B %d, %Y %H:%M:%S"     # 24-hour format
11  }
12  
13  # Return formatted date string
14  format(date_time, format_string)
15}
16
17# Example usage
18timestamp <- 1609459200  # January 1, 2021 00:00:00 UTC
19cat(convert_unix_timestamp(timestamp, FALSE), "\n")  # 24-hour format
20cat(convert_unix_timestamp(timestamp, TRUE), "\n")   # 12-hour format
21

1% MATLAB timestamp conversion
2function formattedDate = convertUnixTimestamp(timestamp, use12Hour)
3    % Convert Unix timestamp to MATLAB datetime
4    % Excel dates are days since 1900-01-01, with 1 = 1900-01-01
5    % Unix timestamps are seconds since 1970-01-01
6    
7    % First convert to Excel date format
8    % 25569 is the number of days between 1900-01-01 and 1970-01-01
9    excelDate = (timestamp / 86400) + 25569;
10    
11    % Format based on 12-hour or 24-hour preference
12    if use12Hour
13        formattedDate = datestr(excelDate, 'dddd, mmmm dd, yyyy h:mm:ss AM/PM');
14    else
15        formattedDate = datestr(excelDate, 'dddd, mmmm dd, yyyy hh:mm:ss');
16    end
17end
18
19% Example usage
20timestamp = 1609459200;  % January 1, 2021 00:00:00 UTC
21disp(convertUnixTimestamp(timestamp, false))  % 24-hour format
22disp(convertUnixTimestamp(timestamp, true))   % 12-hour format
23

1' Excel VBA timestamp conversion
2Function ConvertUnixTimestamp(timestamp As Long, Optional use12Hour As Boolean = False) As String
3    ' Convert Unix timestamp to Excel date/time
4    ' Excel dates are days since 1900-01-01, with 1 = 1900-01-01
5    ' Unix timestamps are seconds since 1970-01-01
6    
7    ' First convert to Excel date format
8    ' 25569 is the number of days between 1900-01-01 and 1970-01-01
9    Dim excelDate As Double
10    excelDate = (timestamp / 86400) + 25569
11    
12    ' Format the date based on 12-hour or 24-hour preference
13    If use12Hour Then
14        ConvertUnixTimestamp = Format(excelDate, "dddd, mmmm d, yyyy h:mm:ss AM/PM")
15    Else
16        ConvertUnixTimestamp = Format(excelDate, "dddd, mmmm d, yyyy hh:mm:ss")
17    End If
18End Function
19
20' Usage in a worksheet:
21' =ConvertUnixTimestamp(1609459200, TRUE)  ' 12-hour format
22' =ConvertUnixTimestamp(1609459200, FALSE) ' 24-hour format
23