TimeDemo.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TimeDemo : MonoBehaviour
{
    string[] monthsList = { "січ", "лют", "бер", "кві", "тра", "чер", "лип", "сер", "вер", "жов", "лис", "гру" };

    public int years; // рік
    public int months = 1; // місяць
    public int days = 1; // день
    public int hours; // час
    public int minutes; // хвилина
    public int seconds; // секунда
    float counter; // лічильник

    void FixedUpdate()
    {
        counter += Time.fixedDeltaTime;

        if (counter >= 1f) {
            seconds++;
            counter = 0;
            if (seconds > 59) {
                seconds = 0;
                minutes++;
                if (minutes > 59) {
                    minutes = 0;
                    hours++;
                    if (hours > 23) {
                        hours = 0;
                        days++;
                        if (days > 30) {
                            days = 1;
                            months++;
                            if (months > 12) {
                                months = 1;
                                years++;
                            }
                        }
                    }
                }
            }
            string sec = (seconds < 10 ? "0" : "") + seconds.ToString();
            string min = (minutes < 10 ? "0" : "") + minutes.ToString();
            string hr = (hours < 10 ? "0" : "") + hours.ToString();

            string dd = (days < 10 ? "0" : "") + days.ToString();
            string mm = monthsList[months - 1];
            string yy = years.ToString();

            Debug.Log(hr + ":" + min + ":" + sec + " " + dd + " " + mm + " " + yy);
        }
    }
}