diff --git a/src/core/core_calendar.erl b/src/core/core_calendar.erl
index f65c5de..26eb238 100644
--- a/src/core/core_calendar.erl
+++ b/src/core/core_calendar.erl
@@ -1,6 +1,7 @@
 -module(core_calendar).
 -include("records.hrl").
--export([create/4, create/5, get_by_id/1, list_by_owner/1, update/2, delete/1]).
+-export([create/4, create/5, get_by_id/1, get_by_short_name/1, get_by_id_or_short_name/1,
+    list_by_owner/1, update/2, delete/1]).
 -export([count_calendars/0, list_all/0]).
 -export([freeze/2, unfreeze/2]).
 -export([count_calendars_by_date/2]).
@@ -78,6 +79,28 @@ get_by_id(Id) ->
     [Calendar] -> {ok, Calendar}
   end.
 
+%% Unique public slug. Empty name is not a slug (many Default calendars).
+-spec get_by_short_name(Name :: binary()) -> {ok, #calendar{}} | {error, not_found}.
+get_by_short_name(<<>>) ->
+  {error, not_found};
+get_by_short_name(Name) when is_binary(Name) ->
+  case mnesia:dirty_index_read(calendar, Name, #calendar.short_name) of
+    [] ->
+      {error, not_found};
+    Rows ->
+      case [C || C <- Rows, C#calendar.status =:= active] of
+        [C | _] -> {ok, C};
+        [] -> {error, not_found}
+      end
+  end.
+
+-spec get_by_id_or_short_name(IdOrSlug :: binary()) -> {ok, #calendar{}} | {error, not_found}.
+get_by_id_or_short_name(IdOrSlug) ->
+  case get_by_id(IdOrSlug) of
+    {ok, C} -> {ok, C};
+    {error, not_found} -> get_by_short_name(IdOrSlug)
+  end.
+
 %%%-------------------------------------------------------------------
 %%% @doc Список активных календарей владельца.
 %%% @end
diff --git a/src/handlers/handler_calendar_by_id.erl b/src/handlers/handler_calendar_by_id.erl
index c9b2c82..a337165 100755
--- a/src/handlers/handler_calendar_by_id.erl
+++ b/src/handlers/handler_calendar_by_id.erl
@@ -121,7 +121,8 @@ get_calendar(Req) ->
       case logic_calendar:get_calendar(UserId, CalendarId) of
         {ok, Calendar} ->
           Json0 = handler_utils:calendar_to_json(Calendar),
-          Following = UserId =/= <<>> andalso logic_calendar_follow:is_following(UserId, CalendarId),
+          Following = UserId =/= <<>> andalso
+            logic_calendar_follow:is_following(UserId, Calendar#calendar.id),
           handler_utils:send_json(Req1, 200, Json0#{following => Following});
         {error, access_denied} ->
           handler_utils:send_error(Req1, 403, <<"Access denied">>);
diff --git a/src/logic/logic_calendar.erl b/src/logic/logic_calendar.erl
index ddc402d..dd78915 100755
--- a/src/logic/logic_calendar.erl
+++ b/src/logic/logic_calendar.erl
@@ -162,7 +162,7 @@ calendar_has_content(CalendarId) ->
 
 %% Получение календаря с проверкой доступа
 get_calendar(UserId, CalendarId) ->
-  case core_calendar:get_by_id(CalendarId) of
+  case core_calendar:get_by_id_or_short_name(CalendarId) of
     {ok, Calendar} ->
       case can_access(UserId, Calendar) of
         true -> {ok, Calendar};
diff --git a/src/logic/logic_calendar_follow.erl b/src/logic/logic_calendar_follow.erl
index 71ada5e..32bdeb7 100755
--- a/src/logic/logic_calendar_follow.erl
+++ b/src/logic/logic_calendar_follow.erl
@@ -15,7 +15,7 @@
 -spec follow(UserId :: binary(), CalendarId :: binary()) ->
   {ok, #calendar_follow{}} | {error, term()}.
 follow(UserId, CalendarId) ->
-  case core_calendar:get_by_id(CalendarId) of
+  case core_calendar:get_by_id_or_short_name(CalendarId) of
     {error, not_found} ->
       {error, not_found};
     {ok, #calendar{owner_id = UserId}} ->
@@ -27,7 +27,7 @@ follow(UserId, CalendarId) ->
         true ->
           case Calendar#calendar.status of
             active ->
-              core_calendar_follow:follow(CalendarId, UserId);
+              core_calendar_follow:follow(Calendar#calendar.id, UserId);
             _ ->
               {error, not_found}
           end
@@ -40,14 +40,13 @@ follow(UserId, CalendarId) ->
 %%%-------------------------------------------------------------------
 -spec unfollow(UserId :: binary(), CalendarId :: binary()) -> ok | {error, term()}.
 unfollow(UserId, CalendarId) ->
-  case core_calendar:get_by_id(CalendarId) of
+  case core_calendar:get_by_id_or_short_name(CalendarId) of
     {error, not_found} ->
-      %% всё равно снимаем локальный follow, если был
       core_calendar_follow:unfollow(CalendarId, UserId);
     {ok, #calendar{owner_id = UserId}} ->
       {error, own_calendar};
-    {ok, _} ->
-      core_calendar_follow:unfollow(CalendarId, UserId)
+    {ok, Calendar} ->
+      core_calendar_follow:unfollow(Calendar#calendar.id, UserId)
   end.
 
 %%%-------------------------------------------------------------------
diff --git a/src/logic/logic_calendar_specialist.erl b/src/logic/logic_calendar_specialist.erl
index b218580..09d67b9 100755
--- a/src/logic/logic_calendar_specialist.erl
+++ b/src/logic/logic_calendar_specialist.erl
@@ -10,12 +10,9 @@
 -spec list(ActorId :: binary(), CalendarId :: binary()) ->
   {ok, [#calendar_specialist{}]} | {error, not_found | access_denied}.
 list(ActorId, CalendarId) ->
-  case core_calendar:get_by_id(CalendarId) of
+  case logic_calendar:get_calendar(ActorId, CalendarId) of
     {ok, Cal} ->
-      case logic_calendar:can_access(ActorId, Cal) of
-        true -> {ok, core_calendar_specialist:list_by_calendar(CalendarId)};
-        false -> {error, access_denied}
-      end;
+      {ok, core_calendar_specialist:list_by_calendar(Cal#calendar.id)};
     Error -> Error
   end.
 
diff --git a/src/logic/logic_event.erl b/src/logic/logic_event.erl
index 0a9869a..113ef05 100755
--- a/src/logic/logic_event.erl
+++ b/src/logic/logic_event.erl
@@ -25,7 +25,7 @@ create_event(UserId, CalendarId, Title, StartTime, Duration, Description) ->
                 {reject, Words} ->
                   {error, {content_banned, Words}};
                 {ok, Action, [Title2, Desc2], Words} ->
-                  case core_event:create(CalendarId, Title2, StartTime, Duration) of
+                  case core_event:create(Calendar#calendar.id, Title2, StartTime, Duration) of
                     {ok, Event} ->
                       case Desc2 of
                         <<>> -> ok;
@@ -64,7 +64,7 @@ create_recurring_event(UserId, CalendarId, Title, StartTime, Duration, RRule, De
                     {reject, Words} ->
                       {error, {content_banned, Words}};
                     {ok, Action, [Title2, Desc2], Words} ->
-                      case core_event:create_recurring(CalendarId, Title2, StartTime, Duration, RRule) of
+                      case core_event:create_recurring(Calendar#calendar.id, Title2, StartTime, Duration, RRule) of
                         {ok, Event} ->
                           case Desc2 of
                             <<>> -> ok;
@@ -184,8 +184,8 @@ get_event(UserId, EventId) ->
 %% Список событий календаря
 list_events(UserId, CalendarId) ->
   case logic_calendar:get_calendar(UserId, CalendarId) of
-    {ok, _} ->
-      core_event:list_by_calendar(CalendarId);
+    {ok, Calendar} ->
+      core_event:list_by_calendar(Calendar#calendar.id);
     Error ->
       Error
   end.
diff --git a/test/api/users/user_calendar_by_id_tests.erl b/test/api/users/user_calendar_by_id_tests.erl
index d4d6732..a417e2e 100644
--- a/test/api/users/user_calendar_by_id_tests.erl
+++ b/test/api/users/user_calendar_by_id_tests.erl
@@ -20,6 +20,7 @@ test() ->
 
   test_get_calendar(Token, CalId),
   test_get_calendar_guest(Token, CalId),
+  test_get_calendar_guest_short_name(Token, CalId),
   test_get_calendar_not_found(Token),
   test_update_calendar(Token, CalId),
   test_update_calendar_settings(Token, CalId),
@@ -49,6 +50,20 @@ test_get_calendar_guest(Token, CalId) ->
   {ok, 403, _, _} = api_test_runner:client_request(get, PPath, <<>>),
   ct:pal("    OK: guest commercial 200, personal 403").
 
+test_get_calendar_guest_short_name(Token, CalId) ->
+  ct:pal("  TEST: Guest GET commercial by short_name"),
+  PathId = <<"/v1/calendars/", CalId/binary>>,
+  Slug2 = <<"sn", (integer_to_binary(erlang:unique_integer([positive])))/binary>>,
+  _ = api_test_runner:client_put(PathId, Token, #{short_name => Slug2}),
+  PathSlug = <<"/v1/calendars/", Slug2/binary>>,
+  {ok, 200, _, Body} = api_test_runner:client_request(get, PathSlug, <<>>),
+  Dec = jsx:decode(list_to_binary(Body), [return_maps]),
+  ?assertEqual(CalId, maps:get(<<"id">>, Dec)),
+  ?assertEqual(Slug2, maps:get(<<"short_name">>, Dec)),
+  EvPath = <<"/v1/calendars/", Slug2/binary, "/events">>,
+  {ok, 200, _, _} = api_test_runner:client_request(get, EvPath, <<>>),
+  ct:pal("    OK: guest GET by short_name").
+
 test_get_calendar_not_found(Token) ->
   ct:pal("  TEST: Get non-existent calendar (404)"),
   Resp = api_test_runner:client_request(get, <<"/v1/calendars/fakeid">>, Token),
diff --git a/test/unit/logic_calendar_tests.erl b/test/unit/logic_calendar_tests.erl
index afc5bab..c2a04bc 100755
--- a/test/unit/logic_calendar_tests.erl
+++ b/test/unit/logic_calendar_tests.erl
@@ -12,6 +12,7 @@ setup() ->
     {attributes, record_info(fields, calendar)},
     {ram_copies, [node()]}
   ]),
+  {atomic, ok} = mnesia:add_table_index(calendar, short_name),
   mnesia:create_table(subscription, [
     {attributes, record_info(fields, subscription)},
     {ram_copies, [node()]}
@@ -38,6 +39,7 @@ logic_calendar_test_() ->
       {"Create calendar test", fun test_create_calendar/0},
       {"Create commercial requires subscription", fun test_create_commercial_gate/0},
       {"Get calendar test", fun test_get_calendar/0},
+      {"Get calendar by short_name", fun test_get_calendar_by_short_name/0},
       {"List calendars test", fun test_list_calendars/0},
       {"Update calendar test", fun test_update_calendar/0},
       {"Persist calendar settings (week_patterns)", fun test_update_settings/0},
@@ -104,6 +106,18 @@ test_get_calendar() ->
   ?assertMatch({error, access_denied},
     logic_calendar:get_calendar(OtherUserId, Calendar#calendar.id)).
 
+test_get_calendar_by_short_name() ->
+  UserId = create_test_user(),
+  {ok, _} = logic_subscription:start_trial(UserId),
+  {ok, Cal} = logic_calendar:create_calendar(UserId, <<"Studio">>, <<>>, manual, commercial),
+  Slug = <<"bizcal-unit-", (Cal#calendar.id)/binary>>,
+  {ok, _} = core_calendar:update(Cal#calendar.id, [{short_name, Slug}]),
+  {ok, Found} = logic_calendar:get_calendar(<<>>, Slug),
+  ?assertEqual(Cal#calendar.id, Found#calendar.id),
+  {ok, Found2} = logic_calendar:get_calendar(UserId, Slug),
+  ?assertEqual(Cal#calendar.id, Found2#calendar.id),
+  ?assertEqual({error, not_found}, logic_calendar:get_calendar(<<>>, <<"no-such-slug">>)).
+
 test_list_calendars() ->
   UserId = create_test_user(),
   {ok, _} = logic_calendar:create_calendar(UserId, <<"Calendar 1">>, <<"">>, manual),