diff --git a/esp8266-weather-station-color.ino b/esp8266-weather-station-color.ino
index 917e083..a998846 100644
--- a/esp8266-weather-station-color.ino
+++ b/esp8266-weather-station-color.ino
@@ -508,7 +508,15 @@ void drawAbout() {
   drawLabelValue(10, "Chip ID:", String(ESP.getChipId()));
   drawLabelValue(11, "VCC: ", String(ESP.getVcc() / 1024.0) +"V");
   drawLabelValue(12, "CPU Freq.: ", String(ESP.getCpuFreqMHz()) + "MHz");
-  drawLabelValue(13, "Uptime: ", String(millis() / 1000) + "s");
+  char time_str[15];
+  const uint32_t millis_in_day = 1000 * 60 * 60 * 24;
+  const uint32_t millis_in_hour = 1000 * 60 * 60;
+  const uint32_t millis_in_minute = 1000 * 60;
+  uint8_t days = millis() / (millis_in_day);
+  uint8_t hours = (millis() - (days * millis_in_day)) / millis_in_hour;
+  uint8_t minutes = (millis() - (days * millis_in_day) - (hours * millis_in_hour)) / millis_in_minute;
+  sprintf(time_str, "%2dd%2dh%2dm", days, hours, minutes);
+  drawLabelValue(13, "Uptime: ", time_str);
   gfx.setTextAlignment(TEXT_ALIGN_LEFT);
   gfx.setColor(MINI_YELLOW);
   gfx.drawString(15, 250, "Last Reset: ");