diff --git a/sdk/azcore/datetime/RFC1123.go b/sdk/azcore/datetime/RFC1123.go
new file mode 100644
index 000000000000..543663cc409f
--- /dev/null
+++ b/sdk/azcore/datetime/RFC1123.go
@@ -0,0 +1,73 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package datetime
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"strings"
+	"time"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
+)
+
+const (
+	DateTimeRFC1123JSON = `"` + time.RFC1123 + `"`
+)
+
+type DateTimeRFC1123 time.Time
+
+func (t DateTimeRFC1123) MarshalJSON() ([]byte, error) {
+	b := []byte(time.Time(t).Format(DateTimeRFC1123JSON))
+	return b, nil
+}
+
+func (t DateTimeRFC1123) MarshalText() ([]byte, error) {
+	b := []byte(time.Time(t).Format(time.RFC1123))
+	return b, nil
+}
+
+func (t *DateTimeRFC1123) UnmarshalJSON(data []byte) error {
+	p, err := time.Parse(DateTimeRFC1123JSON, strings.ToUpper(string(data)))
+	*t = DateTimeRFC1123(p)
+	return err
+}
+
+func (t *DateTimeRFC1123) UnmarshalText(data []byte) error {
+	if len(data) == 0 {
+		return nil
+	}
+	p, err := time.Parse(time.RFC1123, string(data))
+	*t = DateTimeRFC1123(p)
+	return err
+}
+
+func (t DateTimeRFC1123) String() string {
+	return time.Time(t).Format(time.RFC1123)
+}
+
+func PopulateDateTimeRFC1123(m map[string]any, k string, t *time.Time) {
+	if t == nil {
+		return
+	} else if azcore.IsNullValue(t) {
+		m[k] = nil
+		return
+	} else if reflect.ValueOf(t).IsNil() {
+		return
+	}
+	m[k] = (*DateTimeRFC1123)(t)
+}
+
+func UnpopulateDateTimeRFC1123(data json.RawMessage, fn string, t **time.Time) error {
+	if data == nil || string(data) == "null" {
+		return nil
+	}
+	var aux DateTimeRFC1123
+	if err := json.Unmarshal(data, &aux); err != nil {
+		return fmt.Errorf("struct field %s: %v", fn, err)
+	}
+	*t = (*time.Time)(&aux)
+	return nil
+}
diff --git a/sdk/azcore/datetime/RFC3339.go b/sdk/azcore/datetime/RFC3339.go
new file mode 100644
index 000000000000..b8cf08462528
--- /dev/null
+++ b/sdk/azcore/datetime/RFC3339.go
@@ -0,0 +1,181 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package datetime
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
+)
+
+// Azure reports time in UTC but it doesn't include the 'Z' time zone suffix in some cases.
+var tzOffsetRegex = regexp.MustCompile(`(?:Z|z|\\+|-)(?:\\d+:\\d+)*"*$`)
+
+const (
+	utcDateTime        = "2006-01-02T15:04:05.999999999"
+	utcDateTimeJSON    = `"` + utcDateTime + `"`
+	utcDateTimeNoT     = "2006-01-02 15:04:05.999999999"
+	utcDateTimeJSONNoT = `"` + utcDateTimeNoT + `"`
+	dateTimeNoT        = `2006-01-02 15:04:05.999999999Z07:00`
+	dateTimeJSON       = `"` + time.RFC3339Nano + `"`
+	dateTimeJSONNoT    = `"` + dateTimeNoT + `"`
+)
+
+type DateTimeRFC3339 time.Time
+
+func (t DateTimeRFC3339) MarshalJSON() ([]byte, error) {
+	tt := time.Time(t)
+	return tt.MarshalJSON()
+}
+
+func (t DateTimeRFC3339) MarshalText() ([]byte, error) {
+	tt := time.Time(t)
+	return tt.MarshalText()
+}
+
+func (t *DateTimeRFC3339) UnmarshalJSON(data []byte) error {
+	tzOffset := tzOffsetRegex.Match(data)
+	hasT := strings.Contains(string(data), "T") || strings.Contains(string(data), "t")
+	var layout string
+	if tzOffset && hasT {
+		layout = dateTimeJSON
+	} else if tzOffset {
+		layout = dateTimeJSONNoT
+	} else if hasT {
+		layout = utcDateTimeJSON
+	} else {
+		layout = utcDateTimeJSONNoT
+	}
+	return t.Parse(layout, string(data))
+}
+
+func (t *DateTimeRFC3339) UnmarshalText(data []byte) error {
+	if len(data) == 0 {
+		return nil
+	}
+	tzOffset := tzOffsetRegex.Match(data)
+	hasT := strings.Contains(string(data), "T") || strings.Contains(string(data), "t")
+	var layout string
+	if tzOffset && hasT {
+		layout = time.RFC3339Nano
+	} else if tzOffset {
+		layout = dateTimeNoT
+	} else if hasT {
+		layout = utcDateTime
+	} else {
+		layout = utcDateTimeNoT
+	}
+	return t.Parse(layout, string(data))
+}
+
+func (t *DateTimeRFC3339) Parse(layout, value string) error {
+	p, err := time.Parse(layout, strings.ToUpper(value))
+	*t = DateTimeRFC3339(p)
+	return err
+}
+
+func (t DateTimeRFC3339) String() string {
+	return time.Time(t).Format(time.RFC3339Nano)
+}
+
+func PopulateDateTimeRFC3339(m map[string]any, k string, t *time.Time) {
+	if t == nil {
+		return
+	} else if azcore.IsNullValue(t) {
+		m[k] = nil
+		return
+	} else if reflect.ValueOf(t).IsNil() {
+		return
+	}
+	m[k] = (*DateTimeRFC3339)(t)
+}
+
+func UnpopulateDateTimeRFC3339(data json.RawMessage, fn string, t **time.Time) error {
+	if data == nil || string(data) == "null" {
+		return nil
+	}
+	var aux DateTimeRFC3339
+	if err := json.Unmarshal(data, &aux); err != nil {
+		return fmt.Errorf("struct field %s: %v", fn, err)
+	}
+	*t = (*time.Time)(&aux)
+	return nil
+}
+
+const (
+	utcTimeJSON = "15:04:05.999999999"
+	utcTime     = "15:04:05.999999999"
+	timeFormat  = "15:04:05.999999999Z07:00"
+)
+
+type TimeRFC3339 time.Time
+
+func (t TimeRFC3339) MarshalJSON() ([]byte, error) {
+	s, _ := t.MarshalText()
+	return []byte(fmt.Sprintf(`"%s"`, s)), nil
+}
+
+func (t TimeRFC3339) MarshalText() ([]byte, error) {
+	tt := time.Time(t)
+	return []byte(tt.Format(timeFormat)), nil
+}
+
+func (t *TimeRFC3339) UnmarshalJSON(data []byte) error {
+	layout := utcTimeJSON
+	if tzOffsetRegex.Match(data) {
+		layout = timeFormat
+	}
+	return t.Parse(layout, string(data))
+}
+
+func (t *TimeRFC3339) UnmarshalText(data []byte) error {
+	if len(data) == 0 {
+		return nil
+	}
+	layout := utcTime
+	if tzOffsetRegex.Match(data) {
+		layout = timeFormat
+	}
+	return t.Parse(layout, string(data))
+}
+
+func (t *TimeRFC3339) Parse(layout, value string) error {
+	p, err := time.Parse(layout, strings.ToUpper(value))
+	*t = TimeRFC3339(p)
+	return err
+}
+
+func (t TimeRFC3339) String() string {
+	tt := time.Time(t)
+	return tt.Format(timeFormat)
+}
+
+func PopulateTimeRFC3339(m map[string]any, k string, t *time.Time) {
+	if t == nil {
+		return
+	} else if azcore.IsNullValue(t) {
+		m[k] = nil
+		return
+	} else if reflect.ValueOf(t).IsNil() {
+		return
+	}
+	m[k] = (*TimeRFC3339)(t)
+}
+
+func UnpopulateTimeRFC3339(data json.RawMessage, fn string, t **time.Time) error {
+	if data == nil || string(data) == "null" {
+		return nil
+	}
+	var aux TimeRFC3339
+	if err := json.Unmarshal(data, &aux); err != nil {
+		return fmt.Errorf("struct field %s: %v", fn, err)
+	}
+	*t = (*time.Time)(&aux)
+	return nil
+}
diff --git a/sdk/azcore/datetime/date_type.go b/sdk/azcore/datetime/date_type.go
new file mode 100644
index 000000000000..2e04dc1243f3
--- /dev/null
+++ b/sdk/azcore/datetime/date_type.go
@@ -0,0 +1,54 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package datetime
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"time"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
+)
+
+const (
+	fullDateJSON = `2006-01-02`
+	jsonFormat   = `%04d-%02d-%02d`
+)
+
+type DateType time.Time
+
+func (t DateType) MarshalJSON() ([]byte, error) {
+	return []byte(fmt.Sprintf(jsonFormat, time.Time(t).Year(), time.Time(t).Month(), time.Time(t).Day())), nil
+}
+
+func (d *DateType) UnmarshalJSON(data []byte) (err error) {
+	t, err := time.Parse(fullDateJSON, string(data))
+	*d = (DateType)(t)
+	return err
+}
+
+func PopulateDateType(m map[string]any, k string, t *time.Time) {
+	if t == nil {
+		return
+	} else if azcore.IsNullValue(t) {
+		m[k] = nil
+		return
+	} else if reflect.ValueOf(t).IsNil() {
+		return
+	}
+	m[k] = (*DateType)(t)
+}
+
+func UnpopulateDateType(data json.RawMessage, fn string, t **time.Time) error {
+	if data == nil || string(data) == "null" {
+		return nil
+	}
+	var aux DateType
+	if err := json.Unmarshal(data, &aux); err != nil {
+		return fmt.Errorf("struct field %s: %v", fn, err)
+	}
+	*t = (*time.Time)(&aux)
+	return nil
+}
diff --git a/sdk/azcore/datetime/unix.go b/sdk/azcore/datetime/unix.go
new file mode 100644
index 000000000000..0129adcb379c
--- /dev/null
+++ b/sdk/azcore/datetime/unix.go
@@ -0,0 +1,56 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package datetime
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"time"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
+)
+
+type TimeUnix time.Time
+
+func (t TimeUnix) MarshalJSON() ([]byte, error) {
+	return json.Marshal(time.Time(t).Unix())
+}
+
+func (t *TimeUnix) UnmarshalJSON(data []byte) error {
+	var seconds int64
+	if err := json.Unmarshal(data, &seconds); err != nil {
+		return err
+	}
+	*t = TimeUnix(time.Unix(seconds, 0))
+	return nil
+}
+
+func (t TimeUnix) String() string {
+	return fmt.Sprintf("%d", time.Time(t).Unix())
+}
+
+func PopulateTimeUnix(m map[string]any, k string, t *time.Time) {
+	if t == nil {
+		return
+	} else if azcore.IsNullValue(t) {
+		m[k] = nil
+		return
+	} else if reflect.ValueOf(t).IsNil() {
+		return
+	}
+	m[k] = (*TimeUnix)(t)
+}
+
+func UnpopulateTimeUnix(data json.RawMessage, fn string, t **time.Time) error {
+	if data == nil || string(data) == "null" {
+		return nil
+	}
+	var aux TimeUnix
+	if err := json.Unmarshal(data, &aux); err != nil {
+		return fmt.Errorf("struct field %s: %v", fn, err)
+	}
+	*t = (*time.Time)(&aux)
+	return nil
+}