Add TZ env usage to set local time zone.

main.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"log"
+	"os"
+	"time"
 
 	"github.com/unifi-poller/poller"
 
@@ -16,7 +18,22 @@ import (
 
 // Keep it simple.
 func main() {
+	// Set time zone based on TZ env variable.
+	setTimeZone(os.Getenv("TZ"))
+
 	if err := poller.New().Start(); err != nil {
 		log.Fatalln("[ERROR]", err)
 	}
 }
+
+func setTimeZone(tz string) {
+	if tz == "" {
+		return
+	}
+
+	var err error
+
+	if time.Local, err = time.LoadLocation(tz); err != nil {
+		log.Printf("[ERROR] Loading TZ Location '%s': %v\n", tz, err)
+	}
+}