This little Pythonista script formats a callback URL for the iPhone/iPad Due app for 9 consecutive days of reminders for a novena prayer. The script is initiated from Launch Center Pro for each day with the following callback URL pythonista://novenaToDue?action=run&args=nn where nn is the day of novena (1..9).

novenaToDue.py

# This script formats a callback url for the Due app to send a reminder for
# each day of a Novena for the Dead. This script is called by Launch Center Pro
# with a sys argument nn, where nn is which day of the novena (1..9).
# The first day of the novena is set to begin +1 days of current date.
# Time is set for 5:15 of current time zone.

import datetime
import time
import webbrowser
import sys


def get_url(nn):
	"""Formats a callback url for Due app. nn = day of novena"""
	
	if time.daylight == 1:
		tmzn = time.tzname[0]	# Standard time
	else:
		tmzn = time.tzname[1]	# Daylight savings
	tmzn = '&timezone=' + tmzn

	now = datetime.datetime.now()
	dt = datetime.datetime(now.year, now.month, now.day, 5, 15, 0)
	today = time.mktime(dt.timetuple())
	timestamp = today + nn * 60 * 60 * 24

	appurl = 'due://x-callback-url/add?'
	returnurl = '&x-source=Launch&x-success=launch://x-callback-url/returnAction'

	# If Due used return callback properly:
	# returnurl = '&x-source=Pythonista&x-success=%7B%7Bpythonista://x-callback-url/novenaToDue?action=run&argv=' + str(nn+1) + '%7D%7D'

	titestr = 'title=Day%20' + str(nn) + '%20-%20Novena%20for%20the%20Dead'
	duedate = '&duedate=' + str(int(timestamp))
	dueurl = appurl + titestr + duedate + tmzn + returnurl
	return dueurl


if len(sys.argv) > 1:
	nn = int(sys.argv[1])
else:
	nn = 1
if nn >= 1 and nn <= 9:
	thisurl = get_url(nn)
	webbrowser.open(thisurl)