SharePoint Page Navigation Web Part

using System;
using System.Collections.Generic;
using System.Text;

namespace Mullivan.SharePoint.Reminders
{
    public class RmdMonthlyRecurrence : RmdRecurrence
    {
        public override string Name
        {
            get { return "Monthly"; }
        }

        public int StartDay
        {
            get;
            set;
        }

        public int StartHour
        {
            get;
            set;
        }

        public override bool CanRun(DateTime lastRun)
        {
            DateTime dtNow = DateTime.Now;
            int totalDaysInMonth = DateTime.DaysInMonth(lastRun.Year, lastRun.Month);
            int startDay = this.StartDay;
            if(startDay > totalDaysInMonth)
                startDay = totalDaysInMonth;


            //If never run then run
            if (lastRun.Equals(DateTime.MinValue))
                return true;

            DateTime nextOccurence = new DateTime(lastRun.Year, lastRun.Month, startDay, this.StartHour, 0, 0);

            //If lastRun is already greater than the next occurence
            // then we need to increment to the next month
            if (lastRun > nextOccurence)
            {
                //Increment by one month
                int month = lastRun.Month + 1;
                int year = lastRun.Year;

                //If month is over 12 then we need to change the year and set the month
                // back to january
                if (month > 12)
                {
                    month = 1;
                    year++;
                }

                startDay = this.StartDay;
                totalDaysInMonth = DateTime.DaysInMonth(year, month);
                if (startDay > totalDaysInMonth)
                    startDay = totalDaysInMonth;
                nextOccurence = new DateTime(year, month, startDay, this.StartHour, 0, 0);
            }

            if (dtNow > nextOccurence)
                return true;

            return false;
        }
    }
}