diff --git a/cores/esp8266/TZ.h b/cores/esp8266/TZ.h
index ea53c363a8..78369a11ed 100644
--- a/cores/esp8266/TZ.h
+++ b/cores/esp8266/TZ.h
@@ -1,7 +1,7 @@
 
 // autogenerated from https://raw.githubusercontent.com/nayarsystems/posix_tz_db/master/zones.csv
 // by script <esp8266 arduino core>/tools/TZupdate.sh
-// Mon Jul 26 20:04:37 UTC 2021
+// Fri Jan  6 20:48:46 UTC 2023
 //
 // This database is autogenerated from IANA timezone database
 //    https://raw.githubusercontent.com/nayarsystems/posix_tz_db/master/zones.csv
@@ -37,7 +37,7 @@
 #define TZ_Africa_Gaborone	PSTR("CAT-2")
 #define TZ_Africa_Harare	PSTR("CAT-2")
 #define TZ_Africa_Johannesburg	PSTR("SAST-2")
-#define TZ_Africa_Juba	PSTR("EAT-3")
+#define TZ_Africa_Juba	PSTR("CAT-2")
 #define TZ_Africa_Kampala	PSTR("EAT-3")
 #define TZ_Africa_Khartoum	PSTR("CAT-2")
 #define TZ_Africa_Kigali	PSTR("CAT-2")
@@ -227,7 +227,7 @@
 #define TZ_Arctic_Longyearbyen	PSTR("CET-1CEST,M3.5.0,M10.5.0/3")
 #define TZ_Asia_Aden	PSTR("<+03>-3")
 #define TZ_Asia_Almaty	PSTR("<+06>-6")
-#define TZ_Asia_Amman	PSTR("EET-2EEST,M3.5.4/24,M10.5.5/1")
+#define TZ_Asia_Amman	PSTR("EET-2EEST,M2.5.4/24,M10.5.5/1")
 #define TZ_Asia_Anadyr	PSTR("<+12>-12")
 #define TZ_Asia_Aqtau	PSTR("<+05>-5")
 #define TZ_Asia_Aqtobe	PSTR("<+05>-5")
@@ -250,8 +250,8 @@
 #define TZ_Asia_Dubai	PSTR("<+04>-4")
 #define TZ_Asia_Dushanbe	PSTR("<+05>-5")
 #define TZ_Asia_Famagusta	PSTR("EET-2EEST,M3.5.0/3,M10.5.0/4")
-#define TZ_Asia_Gaza	PSTR("EET-2EEST,M3.4.4/48,M10.4.4/49")
-#define TZ_Asia_Hebron	PSTR("EET-2EEST,M3.4.4/48,M10.4.4/49")
+#define TZ_Asia_Gaza	PSTR("EET-2EEST,M3.4.4/48,M10.5.5/1")
+#define TZ_Asia_Hebron	PSTR("EET-2EEST,M3.4.4/48,M10.5.5/1")
 #define TZ_Asia_Ho_Chi_Minh	PSTR("<+07>-7")
 #define TZ_Asia_Hong_Kong	PSTR("HKT-8")
 #define TZ_Asia_Hovd	PSTR("<+07>-7")
@@ -400,7 +400,7 @@
 #define TZ_Indian_Mauritius	PSTR("<+04>-4")
 #define TZ_Indian_Mayotte	PSTR("EAT-3")
 #define TZ_Indian_Reunion	PSTR("<+04>-4")
-#define TZ_Pacific_Apia	PSTR("<+13>-13<+14>,M9.5.0/3,M4.1.0/4")
+#define TZ_Pacific_Apia	PSTR("<+13>-13")
 #define TZ_Pacific_Auckland	PSTR("NZST-12NZDT,M9.5.0,M4.1.0/3")
 #define TZ_Pacific_Bougainville	PSTR("<+11>-11")
 #define TZ_Pacific_Chatham	PSTR("<+1245>-12:45<+1345>,M9.5.0/2:45,M4.1.0/3:45")
diff --git a/libraries/ESP8266WiFi/examples/BearSSL_Validation/certs.h b/libraries/ESP8266WiFi/examples/BearSSL_Validation/certs.h
index ead62edbd5..5a96edfad2 100644
--- a/libraries/ESP8266WiFi/examples/BearSSL_Validation/certs.h
+++ b/libraries/ESP8266WiFi/examples/BearSSL_Validation/certs.h
@@ -1,7 +1,7 @@
 
 // this file is autogenerated - any modification will be overwritten
 // unused symbols will not be linked in the final binary
-// generated on 2022-07-20 14:09:01
+// generated on 2023-01-06 21:52:52
 // by ['../../../../tools/cert.py', '-s', 'www.example.com', '-n', 'SSL']
 
 #pragma once
diff --git a/libraries/ESP8266WiFi/examples/HTTPSRequest/certs.h b/libraries/ESP8266WiFi/examples/HTTPSRequest/certs.h
index 323c3c6a6d..49d250c269 100644
--- a/libraries/ESP8266WiFi/examples/HTTPSRequest/certs.h
+++ b/libraries/ESP8266WiFi/examples/HTTPSRequest/certs.h
@@ -1,7 +1,7 @@
 
 // this file is autogenerated - any modification will be overwritten
 // unused symbols will not be linked in the final binary
-// generated on 2022-07-18 22:03:52
+// generated on 2023-01-06 21:52:53
 // by ['../../../../tools/cert.py', '-s', 'api.github.com', '-n', 'github']
 
 #pragma once
diff --git a/package.json b/package.json
index cec683a941..891d4509b8 100644
--- a/package.json
+++ b/package.json
@@ -2,5 +2,5 @@
     "name": "framework-arduinoespressif8266",
     "description": "Arduino Wiring-based Framework (ESP8266 Core)",
     "url": "https://github.com/esp8266/Arduino",
-    "version": "3.1.0-dev"
+    "version": "3.1.0"
 }
diff --git a/platform.txt b/platform.txt
index aad2b37b1b..5334d3ee2e 100644
--- a/platform.txt
+++ b/platform.txt
@@ -5,8 +5,8 @@
 # For more info:
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5-3rd-party-Hardware-specification
 
-name=ESP8266 Boards (3.1.0-dev)
-version=3.1.0-dev
+name=ESP8266 Boards (3.1.0)
+version=3.1.0
 
 # These will be removed by the packager script when doing a JSON release
 runtime.tools.xtensa-lx106-elf-gcc.path={runtime.platform.path}/tools/xtensa-lx106-elf