One common problem when dealing with vendor interoperability is the handling of

Question

One common problem when dealing with vendor interoperability is the handling of dates. You may have a system that handles operations in Pacific Time (UTC -7 or UTC-8 depending on the day of the year), and you may have a system that handles dates based in UTC. Since 2007, daylight savings time is observed as follows in Pacific Time: Between the second Sunday in March and the first Sunday in November, Pacific Time is UTC -07:00 At all other times, Pacific Time is UTC -08:00. You can assume the following functions are available: A. dayofweek(date | datetime) = Indexed day of the week. Monday = 1, Sunday = 7 B. day(date | datetime) = day of the month C. month(date | datetime) = numeric month Given a date, write a program in Python hat can be used to calculate the UTC time that is the equivalent of midnight Pacific Time. Example inputs and outputs: A. 2016-04-04 -> 2016-04-04 07:00 UTC B. 2016-11-16 -> 2016-11-16 08:00 UTC

Explanation / Answer

def month(mydate):
   if(mydate.strftime("%b") == "Mar"):
       return 1
   if(mydate.strftime("%b") == "Apr"):
       return 2
   if(mydate.strftime("%b") == "May"):
       return 3
   if(mydate.strftime("%b") == "Jun"):
       return 4
   if(mydate.strftime("%b") == "Jul"):
       return 5
   if(mydate.strftime("%b") == "Aug"):
       return 6
   if(mydate.strftime("%b") == "Sep"):
       return 7
   if(mydate.strftime("%b") == "Oct"):
       return 8
   if(mydate.strftime("%b") == "Mar"):
       return 9
   if(mydate.strftime("%b") == "Dec"):
       return 10
   if(mydate.strftime("%b") == "Jan"):
       return 11
   if(mydate.strftime("%b") == "Feb"):
       return 12

def dow(date):
days=["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"]
return date.weekday() + 1

def day(date):
   if (month(my_date) > 9):
       print( my_date + "08:00 UTC")
   if (month(my_date) > 1 and month(my_date) < 9):
       print( my_date + "07:00 UTC")
   if (month(my_date) == 1):
       if(my_date.day > 7 and my_date.day < 15 and dow < 7):
           print( my_date + "08:00 UTC")
       else print( my_date + "07:00 UTC")
   if (month(my_date) == 9 and my_date.day < 7):
       print( my_date + "07:00 UTC")
   else print print( my_date + "08:00 UTC")

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