diff --git a/code.gs b/code.gs
index b9e1510..c239cfe 100644
--- a/code.gs
+++ b/code.gs
@@ -1016,6 +1016,7 @@ function updateWindGuru_() {
   let hash = md5_(salt + windGuruStationUID + windGuruStationPassword);
   request += '&hash=' + hash;
   request += '&interval=60';
+  request += '&unixtime=' + (conditions.time / 1000).toFixedNumber(0);
   if (conditions.temp != null) request += '&temperature=' + conditions.temp.c;
   if (conditions.windSpeed != null) request += '&wind_avg=' + conditions.windSpeed.knots;
   if (conditions.windGust != null) request += '&wind_max=' + conditions.windGust.knots;
@@ -1244,4 +1245,4 @@ Number.prototype.heatIndex = function(humidity, units='F') {
   let heatIndexF = -42.379 + 2.04901523 * T + 10.14333127 * H - 0.22475541 * T * H - 6.83783 * Math.pow(10, -3) * Math.pow(T, 2) - 5.481717 * Math.pow(10, -2) * Math.pow(H, 2) + 1.22874 * Math.pow(10, -3) * Math.pow(T, 2) * H   + 8.5282 * Math.pow(10, -4) * T * Math.pow(H, 2) - 1.99 * Math.pow(10, -6) * Math.pow(T, 2) * Math.pow(H, 2);
   return units === 'F' ? heatIndexF : heatIndexF.fToC();
 }
-Number.prototype.toFixedNumber = function(digits) { return +this.toFixed(digits); }
\ No newline at end of file
+Number.prototype.toFixedNumber = function(digits) { return +this.toFixed(digits); }