fix: Return date as a string instead of local time

pkg/dbtimesprovider/provider.go

@@ -42,18 +42,19 @@ func (p Provider) Name() string {
 
 func (p Provider) Get(ctx context.Context, location string) ([]prayer.Times, error) {
 	times, err := p.loadTimes(ctx, location)
-	if err == nil && len(times) != 0 {
-		return times, nil
-	} else if err != nil {
+	if err != nil {
 		return nil, fmt.Errorf("failed to load prayer times from db: %w", err)
 	}
+	if len(times) > 0 {
+		return times, nil
+	}
 
 	times, err = p.provider.Get(ctx, location)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get prayer times: %w", err)
 	}
 
-	if len(times) > 1 {
+	if len(times) > 0 {
 		if err := p.saveTimes(ctx, location, times); err != nil {
 			return nil, fmt.Errorf("failed to save times to db: %w", err)
 		}
@@ -110,15 +111,15 @@ func Migrate(con *sql.DB) error {
 }
 
 type prayerTimesRow struct {
-	ProviderID int64     `db:"provider_id"`
-	LocationID string    `db:"location_id"`
-	Date       time.Time `db:"date"`
-	Fajr       string    `db:"fajr"`
-	Sunrise    string    `db:"sunrise"`
-	Dhuhr      string    `db:"dhuhr"`
-	Asr        string    `db:"asr"`
-	Maghrib    string    `db:"maghrib"`
-	Isha       string    `db:"isha"`
+	ProviderID int64  `db:"provider_id"`
+	LocationID string `db:"location_id"`
+	Date       string `db:"date"`
+	Fajr       string `db:"fajr"`
+	Sunrise    string `db:"sunrise"`
+	Dhuhr      string `db:"dhuhr"`
+	Asr        string `db:"asr"`
+	Maghrib    string `db:"maghrib"`
+	Isha       string `db:"isha"`
 }
 
 func (r prayerTimesRow) toDomain() prayer.Times {
@@ -166,7 +167,7 @@ func (p Provider) saveTimes(ctx context.Context, locationID string, times []pray
 
 func (p Provider) loadTimes(ctx context.Context, locationID string) ([]prayer.Times, error) {
 	now := p.clockFunc()
-	today := now.Truncate(time.Hour * 24)
+	today := now.UTC().Truncate(time.Hour * 24)
 
 	q := p.db.
 		From(goqu.T("prayer_times").As("pt")).