doc: add question about timezone in FAQ

doc/de/weechat_faq.de.adoc

@@ -421,6 +421,28 @@ Mit einer älteren Version von WeeChat:
 /upgrade
 ----
 
+// TRANSLATION MISSING
+[[timezone]]
+=== How can I change the timezone?
+
+// TRANSLATION MISSING
+There is no option in WeeChat to change the timezone, the environment variable
+`TZ` must be set to the appropriate value.
+
+// TRANSLATION MISSING
+In your shell initialization file or on command line, before starting WeeChat:
+
+----
+export TZ=Europe/Berlin
+----
+
+// TRANSLATION MISSING
+In WeeChat, the new value is immediately used:
+
+----
+/set env TZ Europe/Berlin
+----
+
 [[use_256_colors]]
 === Wie kann ich 256 Farben in WeeChat nutzen?
 

doc/en/weechat_faq.en.adoc

@@ -389,6 +389,24 @@ With older WeeChat:
 /upgrade
 ----
 
+[[timezone]]
+=== How can I change the timezone?
+
+There is no option in WeeChat to change the timezone, the environment variable
+`TZ` must be set to the appropriate value.
+
+In your shell initialization file or on command line, before starting WeeChat:
+
+----
+export TZ=America/New_York
+----
+
+In WeeChat, the new value is immediately used:
+
+----
+/set env TZ America/New_York
+----
+
 [[use_256_colors]]
 === How can I use 256 colors in WeeChat?
 

doc/fr/weechat_faq.fr.adoc

@@ -403,6 +403,25 @@ Avec un ancien WeeChat :
 /upgrade
 ----
 
+[[timezone]]
+=== Comment puis-je changer le fuseau horaire ?
+
+Il n'y a pas d'option pour changer le fuseau horaire dans WeeChat, la variable
+d'environnement `TZ` doit être positionnée à la valeur appropriée.
+
+Dans votre fichier d'initialisation du shell ou sur la ligne de commande, avant
+de démarrer WeeChat :
+
+----
+export TZ=Europe/Paris
+----
+
+Dans WeeChat, la nouvelle valeur est immédiatement utilisée :
+
+----
+/set env TZ Europe/Paris
+----
+
 [[use_256_colors]]
 === Comment puis-je utiliser 256 couleurs sous WeeChat ?
 

doc/it/weechat_faq.it.adoc

@@ -429,6 +429,28 @@ With older WeeChat:
 /upgrade
 ----
 
+// TRANSLATION MISSING
+[[timezone]]
+=== How can I change the timezone?
+
+// TRANSLATION MISSING
+There is no option in WeeChat to change the timezone, the environment variable
+`TZ` must be set to the appropriate value.
+
+// TRANSLATION MISSING
+In your shell initialization file or on command line, before starting WeeChat:
+
+----
+export TZ=Europe/Rome
+----
+
+// TRANSLATION MISSING
+In WeeChat, the new value is immediately used:
+
+----
+/set env TZ Europe/Rome
+----
+
 [[use_256_colors]]
 === Come posso usare 256 colori in WeeChat?
 

doc/ja/weechat_faq.ja.adoc

@@ -385,6 +385,28 @@ WeeChat バージョン 1.0 以上の場合、再起動せずに変更できま
 /upgrade
 ----
 
+// TRANSLATION MISSING
+[[timezone]]
+=== How can I change the timezone?
+
+// TRANSLATION MISSING
+There is no option in WeeChat to change the timezone, the environment variable
+`TZ` must be set to the appropriate value.
+
+// TRANSLATION MISSING
+In your shell initialization file or on command line, before starting WeeChat:
+
+----
+export TZ=Asia/Tokyo
+----
+
+// TRANSLATION MISSING
+In WeeChat, the new value is immediately used:
+
+----
+/set env TZ Asia/Tokyo
+----
+
 [[use_256_colors]]
 === どうすれば WeeChat で 256 色が使えますか。
 

doc/pl/weechat_faq.pl.adoc

@@ -391,6 +391,28 @@ Dla starszych wersji WeeChat:
 /upgrade
 ----
 
+// TRANSLATION MISSING
+[[timezone]]
+=== How can I change the timezone?
+
+// TRANSLATION MISSING
+There is no option in WeeChat to change the timezone, the environment variable
+`TZ` must be set to the appropriate value.
+
+// TRANSLATION MISSING
+In your shell initialization file or on command line, before starting WeeChat:
+
+----
+export TZ=Europe/Warsaw
+----
+
+// TRANSLATION MISSING
+In WeeChat, the new value is immediately used:
+
+----
+/set env TZ Europe/Warsaw
+----
+
 [[use_256_colors]]
 === Jak mogę użyć 256 kolorów w WeeChat?