List today, start of next month, start of 2 months hence, etc. up to start of 12 months hence

get_start_date_choices.py

from django.utils.timezone import now

from dateutil.rrule import MONTHLY, rrule


def get_start_date_choices():
    today = now().date()
    choices = [(today, "Now")]
    for start_date in rrule(MONTHLY, count=12, dtstart=today,
                            bymonthday=1):
        if start_date.date().year == today.year:
            date_format = "%B"
        else:
            date_format = "%B %Y"
        choices.append((start_date.date().isoformat(), start_date.strftime(date_format)))
    return choices