bugfix wunderground reporting

internal/config/config.go

@@ -2,6 +2,7 @@ package config
 
 import (
 	"errors"
+	"fmt"
 	"os"
 	"strings"
 	"time"
@@ -31,6 +32,7 @@ type Config struct {
 		Latitude   float64 `yaml:"latitude"`
 		Longitude  float64 `yaml:"longitude"`
 		ElevationM float64 `yaml:"elevation_m"`
+		Timezone   string  `yaml:"timezone"`
 	} `yaml:"site"`
 
 	Pollers struct {
@@ -105,6 +107,11 @@ func Load(path string) (*Config, error) {
 	if c.Site.Name == "" {
 		c.Site.Name = "default"
 	}
+	if c.Site.Timezone != "" {
+		if _, err := time.LoadLocation(c.Site.Timezone); err != nil {
+			return nil, fmt.Errorf("invalid site timezone %q: %w", c.Site.Timezone, err)
+		}
+	}
 	if c.Pollers.OpenMeteo.Model == "" {
 		c.Pollers.OpenMeteo.Model = "ecmwf"
 	}