diff --git a/server/szurubooru/search/configs/base_search_config.py b/server/szurubooru/search/configs/base_search_config.py
index d60f3617..92ddb4c5 100644
--- a/server/szurubooru/search/configs/base_search_config.py
+++ b/server/szurubooru/search/configs/base_search_config.py
@@ -11,6 +11,7 @@ class BaseSearchConfig:
     SORT_NONE = tokens.SortToken.SORT_NONE
     SORT_ASC = tokens.SortToken.SORT_ASC
     SORT_DESC = tokens.SortToken.SORT_DESC
+    SORT_DESC_NULL_LAST = tokens.SortToken.SORT_DESC_NULL_LAST
 
     def on_search_query_parsed(self, search_query: SearchQuery) -> None:
         pass
diff --git a/server/szurubooru/search/configs/post_search_config.py b/server/szurubooru/search/configs/post_search_config.py
index ddc003b7..3f681b80 100644
--- a/server/szurubooru/search/configs/post_search_config.py
+++ b/server/szurubooru/search/configs/post_search_config.py
@@ -305,7 +305,13 @@ class PostSearchConfig(BaseSearchConfig):
                     ),
                 ),
                 (
-                    ["creation-date", "creation-time", "date", "time"],
+                    [
+                        "creation-date",
+                        "creation-time",
+                        "date",
+                        "time",
+                        "posted",
+                    ],
                     search_util.create_date_filter(model.Post.creation_time),
                 ),
                 (
@@ -314,9 +320,14 @@ class PostSearchConfig(BaseSearchConfig):
                         "last-edit-time",
                         "edit-date",
                         "edit-time",
+                        "edited",
                     ],
                     search_util.create_date_filter(model.Post.last_edit_time),
                 ),
+                (
+                    ["date-taken", "time-taken", "taken"],
+                    search_util.create_date_filter(model.Post.date_taken),
+                ),
                 (
                     ["comment-date", "comment-time"],
                     search_util.create_date_filter(
@@ -403,6 +414,10 @@ class PostSearchConfig(BaseSearchConfig):
                     ],
                     (model.Post.last_edit_time, self.SORT_DESC),
                 ),
+                (
+                    ["date-taken", "taken"],
+                    (model.Post.date_taken, self.SORT_DESC_NULL_LAST),
+                ),
                 (
                     ["comment-date", "comment-time"],
                     (model.Post.last_comment_creation_time, self.SORT_DESC),
diff --git a/server/szurubooru/search/configs/util.py b/server/szurubooru/search/configs/util.py
index 58e6ebe5..bb851f0e 100644
--- a/server/szurubooru/search/configs/util.py
+++ b/server/szurubooru/search/configs/util.py
@@ -179,6 +179,8 @@ def apply_date_criterion_to_column(
         elif criterion.max_value:
             max_date = util.parse_time_range(criterion.max_value)[1]
             expr = column <= max_date
+    elif isinstance(criterion, criteria.NullCriterion):
+        expr = column == sa.sql.null()
     else:
         assert False
     return expr
diff --git a/server/szurubooru/search/criteria.py b/server/szurubooru/search/criteria.py
index 633c6f2e..3e052f41 100644
--- a/server/szurubooru/search/criteria.py
+++ b/server/szurubooru/search/criteria.py
@@ -42,3 +42,12 @@ class ArrayCriterion(BaseCriterion):
 
     def __hash__(self) -> int:
         return hash(tuple(["array"] + self.values))
+
+
+class NullCriterion(BaseCriterion):
+    def __init__(self, original_text) -> None:
+        super().__init__(original_text)
+        self.value = None
+
+    def __hash__(self) -> int:
+        return hash(self.value)
diff --git a/server/szurubooru/search/executor.py b/server/szurubooru/search/executor.py
index a5ef9625..0e77465a 100644
--- a/server/szurubooru/search/executor.py
+++ b/server/szurubooru/search/executor.py
@@ -189,6 +189,10 @@ class Executor:
                     db_query = db_query.order_by(column.asc())
                 elif order == sort_token.SORT_DESC:
                     db_query = db_query.order_by(column.desc())
+                elif order == sort_token.SORT_DESC_NULL_LAST:
+                    db_query = db_query.order_by(
+                        column.is_(None), column.desc()
+                    )
 
         db_query = self.config.finalize_query(db_query)
         return db_query
diff --git a/server/szurubooru/search/parser.py b/server/szurubooru/search/parser.py
index d5e0f2f8..3dde380f 100644
--- a/server/szurubooru/search/parser.py
+++ b/server/szurubooru/search/parser.py
@@ -19,6 +19,8 @@ def _create_criterion(
         if not low and not high:
             raise errors.SearchError("Empty ranged value")
         return criteria.RangedCriterion(original_value, low, high)
+    if value.lower() in ["null", "none", "unknown", "?"]:
+        return criteria.NullCriterion(original_value)
     return criteria.PlainCriterion(original_value, value)
 
 
diff --git a/server/szurubooru/search/tokens.py b/server/szurubooru/search/tokens.py
index 9f4eeedd..14f7800d 100644
--- a/server/szurubooru/search/tokens.py
+++ b/server/szurubooru/search/tokens.py
@@ -23,6 +23,7 @@ class NamedToken(AnonymousToken):
 
 class SortToken:
     SORT_DESC = "desc"
+    SORT_DESC_NULL_LAST = "desc null last"
     SORT_ASC = "asc"
     SORT_NONE = ""
     SORT_DEFAULT = "default"