things change

import csv
from datetime import datetime
from operator import attrgetter
#======================================================
# A re-creation of my Reminder program from several decades ago!! My first Python program!
#
# Version 0.1 04-Mar-2021 In the beginning
# Version 0.2 07-Mar-2021 In the beginning 
# Version 0.3 07-Mar-2021 I'm finally happy!
#======================================================
class Reminder:
    def __init__(self, myRec):
        self.Date = myRec[0]
        self.DateTimeConversion = datetime.strptime(myRec[0],"%d-%b-%Y")
        self.Message = myRec[1]
#======================================================
# Function GetReminderData to get the reminder data
#
#
# Read each record in the file
# Ignore any blank lines 
# Add each record to the list myReminders
#
def GetReminderData(myFile,myReminders) :
    with open(myFile) as csv_file:
        csv_reader = csv.reader(csv_file, delimiter=',')
        line_count = 0
        for rec in csv_reader:
            if rec == []:
                pass
            else:
                line_count += 1
                p = Reminder(rec)
                myReminders.append(p)    
    csv_file.close()
#====================================================
# Function HowManyDaysDifference to get the number of days between today's date and a text date
# This is my weird code - what a palaver!
def HowManyDaysDifference(TextDate):
    today_object = datetime.now()
    mydate_in_datetime = datetime.strptime(TextDate,"%d-%b-%Y")
    tdiff = mydate_in_datetime - today_object
    diff_in_days = tdiff.days
    if diff_in_days >= 0:
        diff_in_days += 1
    else:
        tdiff = today_object - mydate_in_datetime
        diff_in_days = -tdiff.days
  
    return diff_in_days

#==================================================
# Function PrintList to nicely print the data
def PrintList ():
    mySectionSeparator = "-" * 75
    tChange = True
    print ("\n" * 10 )
    print ("         Welcome to my Python Reminder program!")
    print (mySectionSeparator)
    
    for i in sorted(myReminders, key = attrgetter('DateTimeConversion')):
        nDays = HowManyDaysDifference(i.Date)
        if tChange and nDays > 0:
            tChange = False
            print (mySectionSeparator)
        if nDays == 0:
            t1 = "     Today    "
        elif nDays == -1:
            t1 = "   Yesterday  "
        elif nDays == 1:
            t1 = "    Tomorrow  "
        elif nDays < 0:
            t1 = '{:4d}'.format(-nDays) + " days since"
        else:
            t1 = '{:4d}'.format(nDays) + " days until"
        t2 = i.Date +t1
        print (t2,i.Message) 
    
    print (mySectionSeparator)
#=================================================
# This is the MAIN  program
#
myFile = 'C:/Users/Mike/Documents/Documents/MyPythonCode/Reminder.dat'
myReminders = []
GetReminderData(myFile, myReminders)
PrintList()