Epoch timestamps are clamped to year 2000 or greater.

GabrielNotman · GabrielNotman · commit d42615dfdafb · 2015-10-07T14:12:31.000+01:00
diff --git a/src/RTCZero.cpp b/src/RTCZero.cpp
@@ -408,7 +408,12 @@ uint32_t RTCZero::getY2kEpoch()
 
 void RTCZero::setEpoch(uint32_t ts)
 {
-  setY2kEpoch(ts - EPOCH_TIME_OFF);
+  if (ts < EPOCH_TIME_OFF) {
+    setY2kEpoch(0);
+  }
+  else {
+    setY2kEpoch(ts - EPOCH_TIME_OFF);
+  }
 }
 
 void RTCZero::setY2kEpoch(uint32_t ts)

Original file line number	Diff line number	Diff line change
`@@ -408,7 +408,12 @@ uint32_t RTCZero::getY2kEpoch()`
`408`	`408`
`409`	`409`	`void RTCZero::setEpoch(uint32_t ts)`
`410`	`410`	`{`
`411`		`- setY2kEpoch(ts - EPOCH_TIME_OFF);`
	`411`	`+ if (ts < EPOCH_TIME_OFF) {`
	`412`	`+ setY2kEpoch(0);`
	`413`	`+ }`
	`414`	`+ else {`
	`415`	`+ setY2kEpoch(ts - EPOCH_TIME_OFF);`
	`416`	`+ }`
`412`	`417`	`}`
`413`	`418`
`414`	`419`	`void RTCZero::setY2kEpoch(uint32_t ts)`