Create phase model to store the calendar

apps/participation/models.py

@@ -6,6 +6,7 @@ from django.core.validators import RegexValidator
 from django.db import models
 from django.db.models import Index
 from django.urls import reverse_lazy
+from django.utils import timezone
 from django.utils.crypto import get_random_string
 from django.utils.text import format_lazy
 from django.utils.translation import gettext_lazy as _
@@ -168,3 +169,34 @@ class Video(models.Model):
     class Meta:
         verbose_name = _("video")
         verbose_name_plural = _("videos")
+
+
+class Phase(models.Model):
+    phase_number = models.AutoField(
+        primary_key=True,
+        unique=True,
+        verbose_name=_("phase number"),
+    )
+
+    description = models.CharField(
+        max_length=255,
+        verbose_name=_("phase description"),
+    )
+
+    start = models.DateTimeField(
+        verbose_name=_("start date of the given phase"),
+        default=timezone.now,
+    )
+
+    end = models.DateTimeField(
+        verbose_name=_("end date of the given phase"),
+        default=timezone.now,
+    )
+
+    def __str__(self):
+        return _("Phase {phase_number:d} starts on {start:%Y-%m-%d %H:%M:} and ends on {end:%Y-%m-%d %H:%M}")\
+            .format(phase_number=self.phase_number, start=self.start, end=self.end)
+
+    class Meta:
+        verbose_name = _("phase")
+        verbose_name_plural = _("phases")