diff --git a/model/park.go b/model/park.go
index 23a488d..c681cc8 100644
--- a/model/park.go
+++ b/model/park.go
@@ -62,9 +62,9 @@ type ParkSimplified struct {
 }
 
 type ParkPeriodStatistics struct {
-	Id     string     `bun:"park__id,notnull" json:"id"`
-	Name   string     `bun:"park__name,notnull" json:"name"`
-	Period *time.Time `bun:"type:date" json:"period" time_format:"simple_date" time_location:"shanghai"`
+	Id     string `bun:"park__id,notnull" json:"id"`
+	Name   string `bun:"park__name,notnull" json:"name"`
+	Period *Date  `bun:"type:date" json:"period"`
 }
 
 func FromPark(park Park) ParkSimplified {
diff --git a/model/report.go b/model/report.go
index 79191e1..fc1a417 100644
--- a/model/report.go
+++ b/model/report.go
@@ -69,7 +69,7 @@ type ReportIndexSimplified struct {
 	bun.BaseModel         `bun:"table:report,alias:r"`
 	Id                    string     `bun:",pk,notnull" json:"id"`
 	ParkId                string     `bun:",notnull" json:"parkId"`
-	Period                time.Time  `bun:"type:date,notnull" json:"period" time_format:"simple_date" time_location:"shanghai"`
+	Period                Date       `bun:"type:date,notnull" json:"period"`
 	StepState             Steps      `bun:"type:jsonb,notnull" json:"stepState"`
 	Published             bool       `bun:",notnull,default:false" json:"published"`
 	PublishedAt           *time.Time `bun:"type:timestampz" json:"publishedAt" time_format:"simple_datetime" time_location:"shanghai"`
diff --git a/model/types.go b/model/types.go
new file mode 100644
index 0000000..0acd31c
--- /dev/null
+++ b/model/types.go
@@ -0,0 +1,78 @@
+package model
+
+import (
+	"database/sql"
+	"database/sql/driver"
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+type Date struct {
+	time.Time
+}
+
+func NewDate(t time.Time) Date {
+	loc, err := time.LoadLocation("Asia/Shanghai")
+	if err != nil {
+		panic(err)
+	}
+	t = t.In(loc)
+	return Date{
+		Time: time.Date(0, 1, 1, t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), loc),
+	}
+}
+
+var _ driver.Valuer = (*Date)(nil)
+
+func (d Date) Value() (driver.Value, error) {
+	loc, err := time.LoadLocation("Asia/Shanghai")
+	if err != nil {
+		panic(err)
+	}
+	return d.In(loc).Format("2006-01-02"), nil
+}
+
+var _ sql.Scanner = (*Date)(nil)
+
+// Scan scans the time parsing it if necessary using timeFormat.
+func (d *Date) Scan(src interface{}) (err error) {
+	loc, err := time.LoadLocation("Asia/Shanghai")
+	if err != nil {
+		panic(err)
+	}
+	switch src := src.(type) {
+	case time.Time:
+		*d = NewDate(src)
+		return nil
+	case string:
+		d.Time, err = time.ParseInLocation("2006-01-02", src, loc)
+		return err
+	case []byte:
+		d.Time, err = time.ParseInLocation("2006-01-02", string(src), loc)
+		return err
+	case nil:
+		d.Time = time.Time{}
+		return nil
+	default:
+		return fmt.Errorf("unsupported data type: %T", src)
+	}
+}
+
+var _ json.Marshaler = (*Date)(nil)
+
+func (d Date) MarshalJSON() ([]byte, error) {
+	return []byte(d.Time.Format("2006-01-02")), nil
+}
+
+var _ json.Unmarshaler = (*Date)(nil)
+
+func (d *Date) UnmarshalJSON(raw []byte) error {
+	loc, err := time.LoadLocation("Asia/Shanghai")
+	if err != nil {
+		return fmt.Errorf("unable to load time zone, %w", err)
+	}
+	s := string(raw)
+	d.Time, err = time.ParseInLocation("2006-01-02", s, loc)
+	return err
+}
diff --git a/model/user_charges.go b/model/user_charges.go
index 70a89fd..e2902c5 100644
--- a/model/user_charges.go
+++ b/model/user_charges.go
@@ -16,7 +16,7 @@ type UserCharge struct {
 	Fee           decimal.NullDecimal `json:"fee"`
 	Discount      decimal.NullDecimal `json:"discount"`
 	Amount        decimal.NullDecimal `json:"amount"`
-	ChargeTo      time.Time           `bun:"type:date,notnull" json:"chargeTo" time_format:"simple_date" time_location:"shanghai"`
+	ChargeTo      Date                `bun:"type:date,notnull" json:"chargeTo"`
 	Settled       bool                `bun:",notnull,default:false" json:"settled"`
 	SettledAt     *time.Time          `bun:"type:timestamptz" json:"settledAt" time_format:"simple_datetime" time_location:"shanghai"`
 	Cancelled     bool                `bun:",notnull,default:false" json:"cancelled"`
diff --git a/model/user_detail.go b/model/user_detail.go
index 76969b4..8465885 100644
--- a/model/user_detail.go
+++ b/model/user_detail.go
@@ -21,7 +21,7 @@ type UserDetail struct {
 	Contact                    *string         `json:"contact"`
 	Phone                      *string         `json:"phone"`
 	UnitServiceFee             decimal.Decimal `bun:",notnull" json:"unitServiceFee"`
-	ServiceExpiration          time.Time       `bun:"type:date,notnull" json:"serviceExpiration" time_format:"simple_date" time_location:"shanghai"`
+	ServiceExpiration          Date            `bun:"type:date,notnull" json:"serviceExpiration"`
 }
 
 type JoinedUserDetail struct {