Closes #15618: Always use ISO 8601 date & time formatting (#15737)

* Introduce the isodate(), isotime(), and isodatetime() template filters

* Display the relative time on mouse hover

* Render journal entry times in ISO 8601 format

* Use ISO 8601 format when displaying dates & times in a table

* Standardize the use of DateTimeColumn across all tables

netbox/extras/models/models.py

@@ -732,7 +732,7 @@ class JournalEntry(CustomFieldsMixin, CustomLinksMixin, TagsMixin, ExportTemplat
 
     def __str__(self):
         created = timezone.localtime(self.created)
-        return f"{date_format(created, format='SHORT_DATETIME_FORMAT')} ({self.get_kind_display()})"
+        return f"{created.date().isoformat()} {created.time().isoformat(timespec='minutes')} ({self.get_kind_display()})"
 
     def get_absolute_url(self):
         return reverse('extras:journalentry', args=[self.pk])

netbox/extras/tables/tables.py

@@ -432,10 +432,10 @@ class ConfigTemplateTable(NetBoxTable):
 
 
 class ObjectChangeTable(NetBoxTable):
-    time = tables.DateTimeColumn(
+    time = columns.DateTimeColumn(
         verbose_name=_('Time'),
-        linkify=True,
-        format=settings.SHORT_DATETIME_FORMAT
+        timespec='minutes',
+        linkify=True
     )
     user_name = tables.Column(
         verbose_name=_('Username')
@@ -475,10 +475,10 @@ class ObjectChangeTable(NetBoxTable):
 
 
 class JournalEntryTable(NetBoxTable):
-    created = tables.DateTimeColumn(
+    created = columns.DateTimeColumn(
         verbose_name=_('Created'),
-        linkify=True,
-        format=settings.SHORT_DATETIME_FORMAT
+        timespec='minutes',
+        linkify=True
     )
     assigned_object_type = columns.ContentTypeColumn(
         verbose_name=_('Object Type')