NodaTime difference between two dates raw

readme.md

Other than Conventional.cs all code is NodaTime.

Conventional.cs

public static string CalculateTimeDifference(DateTime futureDate)
{
    if (futureDate <= DateTime.Now)
    {
        return "The provided date must be in the future.";
    }

    DateTime now = DateTime.Now;

    // Calculate total months difference
    int months = ((futureDate.Year - now.Year) * 12) + futureDate.Month - now.Month;

    if (futureDate.Day < now.Day)
    {
        months--; // Adjust if the future day is earlier than the current day
    }

    // Calculate remaining days, hours, and minutes
    TimeSpan timeSpan = futureDate - now.AddMonths(months);
    int days = timeSpan.Days;
    int hours = timeSpan.Hours;
    int minutes = timeSpan.Minutes;

    // Build the result dynamically
    return $"{(months > 0 ? $"{months} months, " : "")}{days} days, {hours} hours, {minutes} minutes.";
}

Example.cs

Console.WriteLine(NodaHelpers.GetTimeDifference(new DateTime(2025, 4, 23, 23, 59, 59)));

NodaHelpers.cs

using NodaTime;
using static NodaTime.PeriodUnits;
using static NodaTime.SystemClock;


namespace your_namespace;

public class NodaHelpers
{
    /// <summary>
    /// Calculates the time difference between the current time in a specified time zone
    /// and a given future date and time.
    /// </summary>
    /// <param name="futureDateTime">The future date and time to compare against the current time.</param>
    /// <param name="timeZoneId">The identifier of the time zone to use for the calculation.</param>
    /// <returns>
    /// A string representation of the current time, the future time, and the difference
    /// between them in years, months, days, hours, minutes, and seconds.
    /// </returns>
    public static string GetTimeDifference(DateTime futureDateTime, string timeZoneId = "America/Los_Angeles")
    {
        DateTimeZone timeZone = DateTimeZoneProviders.Tzdb.GetZoneOrNull(timeZoneId);
        if (timeZone == null)
        {
            return $"Error: The time zone '{timeZoneId}' is invalid.";
        }

        ZonedDateTime now = Instance.GetCurrentInstant().InZone(timeZone);
        LocalDateTime futureLocal = LocalDateTime.FromDateTime(futureDateTime);
        ZonedDateTime future = futureLocal.InZoneLeniently(timeZone);

        Period difference = Period.Between(now.LocalDateTime, futureLocal, 
            Days | Hours | Minutes | Seconds);

        return $"Current Time: {now.ToString("MM/dd/yyyy hh:mm:ss", null)}" +
               $"\nFuture Time: {future.ToString("MM/dd/yyyy hh:mm:ss", null)}\n" +
               $"Difference: {difference.Years} years, {difference.Months} months, " +
               $"{difference.Days} days, {difference.Hours} hours, {difference.Minutes} minutes, " +
               $"{difference.Seconds} seconds.";
    }
}