import "dateTime"
import "stringUtil"

months = [
  "January", "February", "March", "April", "May", "June",
  "July", "August", "September", "October", "November", "December",
]

date   = "March 7 2009 7:30pm EST"
print "Original date/time : " + date

// change the date to standard format
items  = date.split
month  = months.indexOf(items[0]) + 1
day    = items[1]
year   = items[2]
time   = items[3]
hour   = time.split(":")[0].val
minute = time.split(":")[1][0:2]
pm     = time.endsWith("pm")
if pm then hour = hour + 12
time   = hour + ":" + minute
zone   = items[4]
date   = year + "-" + month + "-" + day + " " + time

// add 12 hours and display in original format
dval   = dateTime.val(date) + 12*60*60
dfmt   = "MMMM d yyyy h:mmtt"
date2  = dateTime.str(dval, dfmt) + " " + zone
print "12 hours later     : " + date2

// change from EST to MST (2 hours earlier)
date3  = dateTime.str(dval - 2*60*60, dfmt) + " MST"
print "Adjusted to MST    : " + date3