relativedelta_deliveries.py

import datetime

from dateutil.relativedelta import relativedelta
from dateutil.rrule import rrule, MONTHLY


today = datetime.datetime.today()
end1 = today + relativedelta(years=1)
end2 = today + relativedelta(years=2)



frequency = MONTHLY
interval = 5

rule2 = rrule(frequency, today, until=end2, interval=interval, bymonthday=28)

rule1 = rrule(frequency, today, until=end1, interval=interval, bymonthday=28)

dates1 = list(rule1)


rrule3 = rrule(frequency,
               dates1[-1] + relativedelta(months=interval),
               until=end1 + relativedelta(years=1),
               interval=interval,
               bymonthday=28
               )

current_rules1 = [i for i in rule1]
current_rules2 = list(rule2)

print('Correct 2 year')
for i in current_rules2:
    print(i)

print('\n')
print('First 1 Year')
for i in current_rules1:
    print(i)
print('\n')

print('Second 1 Year')
for i in list(rrule3):
    print(i)