diff --git a/src/gps/RTC.cpp b/src/gps/RTC.cpp
index 148782cd7..9053f5b2b 100644
--- a/src/gps/RTC.cpp
+++ b/src/gps/RTC.cpp
@@ -47,8 +47,8 @@ void readFromRTC()
         rtc.begin();
         auto tc = rtc.getDateTime();
         tm t;
-        t.tm_year = tc.year;
-        t.tm_mon = tc.month;
+        t.tm_year = tc.year - 1900;
+        t.tm_mon = tc.month - 1;
         t.tm_mday = tc.day;
         t.tm_hour = tc.hour;
         t.tm_min = tc.minute;
@@ -112,7 +112,7 @@ bool perhapsSetRTC(RTCQuality q, const struct timeval *tv)
             PCF8563_Class rtc;
             rtc.begin();
             tm *t = localtime(&tv->tv_sec);
-            rtc.setDateTime(t->tm_year + 1900, t->tm_mon + 1, t->tm_wday, t->tm_hour, t->tm_min, t->tm_sec);
+            rtc.setDateTime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
             DEBUG_MSG("PCF8563_RTC setDateTime %02d-%02d-%02d %02d:%02d:%02d %ld\n", t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec, tv->tv_sec);
         }
 #elif defined(ARCH_ESP32)
diff --git a/variants/m5stack_coreink/platformio.ini b/variants/m5stack_coreink/platformio.ini
index 9b41675e4..2a0eda96e 100644
--- a/variants/m5stack_coreink/platformio.ini
+++ b/variants/m5stack_coreink/platformio.ini
@@ -12,7 +12,7 @@ build_flags =
 lib_deps = 
   ${esp32_base.lib_deps}
   zinggjm/GxEPD2@^1.4.9
-  lewisxhe/PCF8563_Library@^0.0.1
+  https://github.com/lewisxhe/PCF8563_Library.git#91399f254651537c5ab338dacc7c10d1f087fd09
 board_build.f_cpu = 240000000L
 upload_protocol = esptool
 upload_port = /dev/ttyACM*
diff --git a/variants/t-echo/platformio.ini b/variants/t-echo/platformio.ini
index 42b03b688..cefb8f342 100644
--- a/variants/t-echo/platformio.ini
+++ b/variants/t-echo/platformio.ini
@@ -14,5 +14,5 @@ lib_deps =
   ${nrf52840_base.lib_deps}
   https://github.com/meshtastic/GxEPD2#afce87a97dda1ac31d8a28dc8fa7c6f55dc96a61
   adafruit/Adafruit BusIO@^1.13.2
-  lewisxhe/PCF8563_Library@^0.0.1
+  https://github.com/lewisxhe/PCF8563_Library.git#91399f254651537c5ab338dacc7c10d1f087fd09
 ;upload_protocol = fs