From 9767544ab24c24b8e1572927cfda291f7a9373e6 Mon Sep 17 00:00:00 2001
From: Gabriele Petrioli <gabriele@pollfish.com>
Date: Sat, 26 Sep 2020 16:07:54 +0300
Subject: [PATCH] Fix optional types for .tz()

fixes #1079
---
 types/plugin/timezone.d.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/types/plugin/timezone.d.ts b/types/plugin/timezone.d.ts
index 015e45ba2..558558562 100644
--- a/types/plugin/timezone.d.ts
+++ b/types/plugin/timezone.d.ts
@@ -5,11 +5,11 @@ export = plugin
 
 declare module 'dayjs' {
   interface Dayjs {
-    tz(timezone: string): Dayjs
+    tz(timezone?: string): Dayjs
   }
 
   interface DayjsTimezone {
-    (date: ConfigType, timezone: string): Dayjs
+    (date: ConfigType, timezone?: string): Dayjs
     guess(): string
     setDefault(timezone?: string): void
   }