import datetime
import time
import os
today = datetime.date.today()

ww1start = datetime.date(1914, 7, 28)#WW1 start date
ww1sday = today - ww1start
ww1end = datetime.date(1918, 11, 11)#WW1 end date
ww1eday = today - ww1end

ww2start = datetime.date(1939, 9, 1)#WW2 start date
ww2sday = today - ww2start
ww2end = datetime.date(1945, 9, 2)#WW2 end date
ww2eday = today - ww2end

Koreanwarstart = datetime.date(1950, 6, 25)#Korean War start date
Koreanwarsday = today - Koreanwarstart
Koreanwarend = datetime.date(1953, 7, 27)#Korean War end date
Koreanwareday = today - Koreanwarend

Vietnamwarstart = datetime.date(1955, 11, 1)#Vietnam War start date
Vietnamwarsday = today - Vietnamwarstart
Vietnamwarend = datetime.date(1975, 4, 30)#Vietnam War end date
Vietnamwareday = today - Vietnamwarend

USSRstart = datetime.date(1922, 12, 30)#U.S.S.R. start date
USSRsday = today - USSRstart
USSRend = datetime.date(1991, 12, 25)#U.S.S.R. end date
USSReday = today - USSRend




while True:
    time.sleep(5)
    os.system('clear')
    print ('    Important Date Counter')
    print ('------------------------------------')
    print ('WW1 Start:' ,ww1sday.days, 'days ago')
    print ('WW1 End:' ,ww1eday.days, 'days ago')
    print ('------------------------------------')
    print ('WW2 Start:' ,ww2sday.days, 'days ago')
    print ('WW2 End:' ,ww2eday.days, 'days ago')
    print ('------------------------------------')
    print ('Korean War Start:' ,Koreanwarsday.days, 'days ago')
    print ('Korean War End:' ,Koreanwareday.days, 'days ago')
    print ('------------------------------------')
    print ('Vietnam War Start:' ,Vietnamwarsday.days, 'days ago')
    print ('Vietnam War End:' ,Vietnamwareday.days, 'days ago')
    print ('------------------------------------')
    print ('U.S.S.R. Start:' ,USSRsday.days, 'days ago')
    print ('U.S.S.R. End:' ,USSReday.days, 'days ago')