diff --git a/synctime.go b/synctime.go
new file mode 100644
index 0000000..7e7cad0
--- /dev/null
+++ b/synctime.go
@@ -0,0 +1,314 @@
+/*
+ * Copyright (c) 2018 - present.  Boling Consulting Solutions (bcsw.net)
+ * Copyright 2020-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package omci
+
+import (
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"github.com/google/gopacket"
+	me "github.com/opencord/omci-lib-go/generated"
+)
+
+type SynchronizeTimeRequest struct {
+	MeBasePacket
+	Year   uint16
+	Month  uint8
+	Day    uint8
+	Hour   uint8
+	Minute uint8
+	Second uint8
+}
+
+func (omci *SynchronizeTimeRequest) String() string {
+	return fmt.Sprintf("%v, Date-Time: %d/%d/%d-%02d:%02d:%02d",
+		omci.MeBasePacket.String(), omci.Year, omci.Month, omci.Day, omci.Hour, omci.Minute, omci.Second)
+}
+
+// LayerType returns LayerTypeSynchronizeTimeRequest
+func (omci *SynchronizeTimeRequest) LayerType() gopacket.LayerType {
+	return LayerTypeSynchronizeTimeRequest
+}
+
+// CanDecode returns the set of layer types that this DecodingLayer can decode
+func (omci *SynchronizeTimeRequest) CanDecode() gopacket.LayerClass {
+	return LayerTypeSynchronizeTimeRequest
+}
+
+// NextLayerType returns the layer type contained by this DecodingLayer.
+func (omci *SynchronizeTimeRequest) NextLayerType() gopacket.LayerType {
+	return gopacket.LayerTypePayload
+}
+
+// DecodeFromBytes decodes the given bytes of a Synchronize Time Request into this layer
+func (omci *SynchronizeTimeRequest) DecodeFromBytes(data []byte, p gopacket.PacketBuilder) error {
+	// Common ClassID/EntityID decode in msgBase
+	getDateAndTime := true
+	var offset, hdrSize int
+	if omci.Extended {
+		offset = 6
+		hdrSize = offset + 7
+		// Extended format allows for the OLT to support not setting the date and
+		// time (not present in the message)
+		// TODO: There is not a way to indicate this to the user at this time, currently
+		//       all date/time fields will be zero
+		if len(data) < offset {
+			p.SetTruncated()
+			return errors.New("frame too small")
+		}
+		if len(data) < hdrSize {
+			getDateAndTime = false
+			hdrSize = len(data)
+		}
+	} else {
+		offset = 4
+		hdrSize := offset + 7
+		if len(data) < hdrSize {
+			p.SetTruncated()
+			return errors.New("frame too small")
+		}
+	}
+	err := omci.MeBasePacket.DecodeFromBytes(data, p, hdrSize)
+	if err != nil {
+		return err
+	}
+	meDefinition, omciErr := me.LoadManagedEntityDefinition(omci.EntityClass,
+		me.ParamData{EntityID: omci.EntityInstance})
+	if omciErr.StatusCode() != me.Success {
+		return omciErr.GetError()
+	}
+	// ME needs to support Synchronize Time
+	if !me.SupportsMsgType(meDefinition, me.SynchronizeTime) {
+		return me.NewProcessingError("managed entity does not support Synchronize Time Message-Type")
+	}
+	// Synchronize Time Entity Class are always ONU-G (256) and Entity Instance of 0
+	if omci.EntityClass != me.OnuGClassID {
+		return me.NewProcessingError("invalid Entity Class for Synchronize Time request")
+	}
+	if omci.EntityInstance != 0 {
+		return me.NewUnknownInstanceError("invalid Entity Instance for Synchronize Time request")
+	}
+
+	if getDateAndTime {
+		omci.Year = binary.BigEndian.Uint16(data[offset:])
+		omci.Month = data[offset+2]
+		omci.Day = data[offset+3]
+		omci.Hour = data[offset+4]
+		omci.Minute = data[offset+5]
+		omci.Second = data[offset+6]
+	}
+	return nil
+}
+
+func decodeSynchronizeTimeRequest(data []byte, p gopacket.PacketBuilder) error {
+	omci := &SynchronizeTimeRequest{}
+	omci.MsgLayerType = LayerTypeSynchronizeTimeRequest
+	return decodingLayerDecoder(omci, data, p)
+}
+
+func decodeSynchronizeTimeRequestExtended(data []byte, p gopacket.PacketBuilder) error {
+	omci := &SynchronizeTimeRequest{}
+	omci.MsgLayerType = LayerTypeSynchronizeTimeRequest
+	omci.Extended = true
+	return decodingLayerDecoder(omci, data, p)
+}
+
+// SerializeTo provides serialization of an Synchronize Time Request message
+func (omci *SynchronizeTimeRequest) SerializeTo(b gopacket.SerializeBuffer, _ gopacket.SerializeOptions) error {
+	// Basic (common) OMCI Header is 8 octets, 10
+	err := omci.MeBasePacket.SerializeTo(b)
+	if err != nil {
+		return err
+	}
+	entity, omciErr := me.LoadManagedEntityDefinition(omci.EntityClass,
+		me.ParamData{EntityID: omci.EntityInstance})
+	if omciErr.StatusCode() != me.Success {
+		return omciErr.GetError()
+	}
+	// ME needs to support Synchronize Time
+	if !me.SupportsMsgType(entity, me.SynchronizeTime) {
+		return me.NewProcessingError("managed entity does not support the Synchronize Time Message-Type")
+	}
+	var offset, length int
+	if omci.Extended {
+		// TODO: Extended format allows for the OLT to support not setting the date and
+		//       time (not present in the message). This needs to be supported in a future
+		//       version of the software.
+		offset = 2
+		length = 7
+	} else {
+		offset = 0
+		length = 7
+	}
+	bytes, err := b.AppendBytes(offset + length)
+	if err != nil {
+		return err
+	}
+	if omci.Extended {
+		binary.BigEndian.PutUint16(bytes, uint16(length))
+	}
+	binary.BigEndian.PutUint16(bytes[offset:], omci.Year)
+	if length > 0 {
+		bytes[offset+2] = omci.Month
+		bytes[offset+3] = omci.Day
+		bytes[offset+4] = omci.Hour
+		bytes[offset+5] = omci.Minute
+		bytes[offset+6] = omci.Second
+	}
+	return nil
+}
+
+type SynchronizeTimeResponse struct {
+	MeBasePacket
+	Result         me.Results
+	SuccessResults uint8 // Only if 'Result' is 0 -> success
+}
+
+func (omci *SynchronizeTimeResponse) String() string {
+	return fmt.Sprintf("%v, Results: %d (%v), Success: %d",
+		omci.MeBasePacket.String(), omci.Result, omci.Result, omci.SuccessResults)
+}
+
+// LayerType returns LayerTypeSynchronizeTimeResponse
+func (omci *SynchronizeTimeResponse) LayerType() gopacket.LayerType {
+	return LayerTypeSynchronizeTimeResponse
+}
+
+// CanDecode returns the set of layer types that this DecodingLayer can decode
+func (omci *SynchronizeTimeResponse) CanDecode() gopacket.LayerClass {
+	return LayerTypeSynchronizeTimeResponse
+}
+
+// NextLayerType returns the layer type contained by this DecodingLayer.
+func (omci *SynchronizeTimeResponse) NextLayerType() gopacket.LayerType {
+	return gopacket.LayerTypePayload
+}
+
+// DecodeFromBytes decodes the given bytes of a Synchronize Time Response into this layer
+func (omci *SynchronizeTimeResponse) DecodeFromBytes(data []byte, p gopacket.PacketBuilder) error {
+	// Common ClassID/EntityID decode in msgBase
+	var hdrSize, offset int
+	if omci.Extended {
+		offset = 6
+		hdrSize = offset + 1
+		// TODO: Extended message set allows for the optional encoding of the of the
+		//       12th octet (success results) even if the result code is not 0/success.
+		//       This functionality is not currently supported.
+	} else {
+		offset = 4
+		hdrSize = offset + 2
+	}
+	err := omci.MeBasePacket.DecodeFromBytes(data, p, hdrSize)
+	if err != nil {
+		return err
+	}
+	meDefinition, omciErr := me.LoadManagedEntityDefinition(omci.EntityClass,
+		me.ParamData{EntityID: omci.EntityInstance})
+	if omciErr.StatusCode() != me.Success {
+		return omciErr.GetError()
+	}
+	// ME needs to support Synchronize Time
+	if !me.SupportsMsgType(meDefinition, me.SynchronizeTime) {
+		return me.NewProcessingError("managed entity does not support Synchronize Time Message-Type")
+	}
+	// Synchronize Time Entity Class are always ONU-G (256) and Entity Instance of 0
+	if omci.EntityClass != me.OnuGClassID {
+		return me.NewProcessingError("invalid Entity Class for Synchronize Time response")
+	}
+	if omci.EntityInstance != 0 {
+		return me.NewUnknownInstanceError("invalid Entity Instance for Synchronize Time response")
+	}
+
+	omci.Result = me.Results(data[offset])
+	if omci.Result > me.DeviceBusy {
+		msg := fmt.Sprintf("invalid results code: %v, must be 0..6", omci.Result)
+		return errors.New(msg)
+	}
+	if omci.Result == me.Success && len(data) > offset+1 {
+		omci.SuccessResults = data[offset+1]
+	} else if omci.Extended && len(data) > offset+1 {
+		omci.SuccessResults = data[offset+1]
+	}
+	return nil
+}
+
+func decodeSynchronizeTimeResponse(data []byte, p gopacket.PacketBuilder) error {
+	omci := &SynchronizeTimeResponse{}
+	omci.MsgLayerType = LayerTypeSynchronizeTimeResponse
+	return decodingLayerDecoder(omci, data, p)
+}
+
+func decodeSynchronizeTimeResponseExtended(data []byte, p gopacket.PacketBuilder) error {
+	omci := &SynchronizeTimeResponse{}
+	omci.MsgLayerType = LayerTypeSynchronizeTimeResponse
+	omci.Extended = true
+	return decodingLayerDecoder(omci, data, p)
+}
+
+// SerializeTo provides serialization of an Synchronize Time Response message
+func (omci *SynchronizeTimeResponse) SerializeTo(b gopacket.SerializeBuffer, _ gopacket.SerializeOptions) error {
+	// Basic (common) OMCI Header is 8 octets, 10
+	err := omci.MeBasePacket.SerializeTo(b)
+	if err != nil {
+		return err
+	}
+	entity, omciErr := me.LoadManagedEntityDefinition(omci.EntityClass,
+		me.ParamData{EntityID: omci.EntityInstance})
+	if omciErr.StatusCode() != me.Success {
+		return omciErr.GetError()
+	}
+	// Synchronize Time Entity Class are always ONU DATA (2) and Entity Instance of 0
+	if omci.EntityClass != me.OnuGClassID {
+		return me.NewProcessingError("invalid Entity Class for Synchronize Time response")
+	}
+	if omci.EntityInstance != 0 {
+		return me.NewUnknownInstanceError("invalid Entity Instance for Synchronize Time response")
+	}
+	// ME needs to support Synchronize Time
+	if !me.SupportsMsgType(entity, me.SynchronizeTime) {
+		return me.NewProcessingError("managed entity does not support the Synchronize Time Message-Type")
+	}
+	var offset int
+	if omci.Extended {
+		offset = 2
+	} else {
+		offset = 0
+	}
+	numBytes := 2
+	if omci.Result != me.Success {
+		// TODO: Extended message set allows for the optional encoding of the of the
+		//       12th octet (success results) even if the result code is not 0/success.
+		//       This functionality is not currently supported
+		numBytes = 1
+	}
+	bytes, err := b.AppendBytes(offset + numBytes)
+	if err != nil {
+		return err
+	}
+	if omci.Extended {
+		binary.BigEndian.PutUint16(bytes, uint16(numBytes))
+	}
+	bytes[offset] = uint8(omci.Result)
+	if omci.Result == me.Success {
+		// TODO: Extended message set allows for the optional encoding of the of the
+		//       12th octet (success results) even if the result code is not 0/success.
+		//       This functionality is not currently supported
+		bytes[offset+1] = omci.SuccessResults
+	}
+	return nil
+}