Handle multiple dates on a model

Using Django
1

The project I have has events and the back end is Django and the front end is Vue.

I have this event model:

from datetime import datetime
from django.db import models
from locations.models import Location 
from django.contrib.auth import get_user_model
from multiselectfield import MultiSelectField

User = get_user_model()

class RepeatDate(models.Model):
    date = models.DateTimeField(auto_now=True)

    class Meta:
        verbose_name = "repeat date"
        verbose_name_plural = "repeat dates"        
        ordering = ['date']
        db_table = "event_repeat_dates"

class Venue(models.Model):
    name = models.CharField(max_length=50)
    location = models.ForeignKey(Location, on_delete=models.CASCADE, default=None)

    created_at = models.DateTimeField(auto_now_add=True, verbose_name="created at")
    updated_at = models.DateTimeField(auto_now=True, verbose_name="updated at")

    class Meta:
        verbose_name = "venue"
        verbose_name_plural = "venues"        
        ordering = ['name']
        db_table = "venues"

    def __str__(self):
        return self.name

class Event(models.Model):
    AUCT = 'AUCT'
    CONF = 'CONF'
    COMU = 'COMU'
    DANC = 'DANC'
    CLUB = 'CLUB'
    CONC = 'CONC'
    MARK = 'MARK'
    TRAD = 'TRAD'
    FEST = 'FEST'
    STAG = 'STAG'
    SPOR = 'SPOR'
    ONLI = 'ONLI'
    WORK = 'WORK'
    TYPES = [
        (AUCT, 'Auction'),
        (CONF, 'Conference'),
        (COMU, 'Community'),
        (DANC, 'Dance'),
        (CLUB, 'Club'),
        (CONC, 'Concert'),
        (MARK, 'Market'),
        (TRAD, 'Trade'),
        (FEST, 'Festival'),
        (STAG, 'Stage'),
        (SPOR, 'Sports'),
        (ONLI, 'Online'),
        (WORK, 'Workshop'),
    ]
    DA = 'DA'
    WE = 'WE'
    MO = 'MO'
    QU = 'QU'
    BI = 'BI'
    AN = 'AN'
    INTERVAL = [
        (DA, 'Daily'),
        (WE, 'Weekly'),
        (MO, 'Monthly'),
        (QU, 'Quarterly'),
        (BI, 'Biannually'),
        (AN, 'Annually'),
    ]
    MO = 'MO'
    TU = 'TU'
    WE = 'WE'
    TH = 'TH'
    FR = 'FR'
    SA = 'SA'
    SU = 'SU'
    DAYS = [
        (MO, 'Monday'),
        (TU, 'Tuesday'),
        (WE, 'Wednesday'),
        (TH, 'Thursday'),
        (FR, 'Friday'),
        (SA, 'Saturday'),
        (SU, 'Sunday'),
    ]
    name = models.CharField(max_length=150, verbose_name="event name")
    type = models.CharField(max_length=4, choices=TYPES, default=None)
    repeat = models.BooleanField(default=False)
    interval = models.CharField(max_length=2, choices=INTERVAL, null=True, blank=True)
    repeating_days = MultiSelectField(max_length=2, choices=DAYS, null=True, blank=True)
    repeating_dates = models.ForeignKey(RepeatDate, on_delete=models.CASCADE, null=True, blank=True)
    startdate = models.DateTimeField(auto_now=True, verbose_name="start date")
    enddate = models.DateTimeField(auto_now=True, verbose_name="start date")
    image = models.FileField(
        upload_to="events/images", blank=True, null=True
    )
    description = models.TextField(max_length=5000)
    venue = models.ForeignKey(Venue, on_delete=models.CASCADE, default=None)
    published = models.BooleanField(default=True)
    pinned = models.BooleanField(default=False)   
    user = models.ForeignKey(User, on_delete=models.CASCADE, default=None) 

    created_at = models.DateTimeField(auto_now_add=True, verbose_name="created at")
    updated_at = models.DateTimeField(auto_now=True, verbose_name="updated at")

    class Meta:
        verbose_name = "event"
        verbose_name_plural = "events"        
        ordering = ['startdate']
        db_table = "events"

    def __str__(self):
        return self.name

Events can repeat and a user can select if an event repeats and whether if repeats every day every week or every month or on selected dates. The select dates in that case will be a mutli-select calendar on the front end. How do I save the data in the back-end and what type of field should I use for that please. At the moment I have a foreign key called repeat dates for a table with the same name but I am not sure if that is going to work correctly so looking for some advice pls.