ut=$(sed '/Universal time:/ { s/^[^:]*: *//; p}; d' "$temp")
rtc=$(sed '/RTC time:/ { s/^[^:]*: *//; p}; d' "$temp")
-uts=$(date -d "$ut" +%s)
-rtcs=$(date -d "$rtc" +%s)
+uts=$(TZ=UTC date -d "$ut" +%s)
+rtcs=$(TZ=UTC date -d "$rtc" +%s)
d=$((uts - rtcs))