diff --git a/doc/guides/rel_notes/release_20_08.rst b/doc/guides/rel_notes/release_20_08.rst
index d72344a180..2ca12fa5ca 100644
--- a/doc/guides/rel_notes/release_20_08.rst
+++ b/doc/guides/rel_notes/release_20_08.rst
@@ -81,6 +81,13 @@ New Features
   Added the RegEx library which provides an API for offload of regular
   expressions search operations to hardware or software accelerator devices.
 
+
+* **Introduced send packet scheduling on the timestamps.**
+
+   Added the new mbuf dynamic field and flag to provide timestamp on what packet
+   transmitting can be synchronized. The device Tx offload flag is added to
+   indicate the PMD supports send scheduling.
+
 * **Updated PCAP driver.**
 
   Updated PCAP driver with new features and improvements, including:
diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 5ff52046dc..598ff80a6e 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -160,6 +160,7 @@ static const struct {
 	RTE_TX_OFFLOAD_BIT2STR(UDP_TNL_TSO),
 	RTE_TX_OFFLOAD_BIT2STR(IP_TNL_TSO),
 	RTE_TX_OFFLOAD_BIT2STR(OUTER_UDP_CKSUM),
+	RTE_TX_OFFLOAD_BIT2STR(SEND_ON_TIMESTAMP),
 };
 
 #undef RTE_TX_OFFLOAD_BIT2STR
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 03356cdb24..57e4a6ca58 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -1287,6 +1287,10 @@ struct rte_eth_conf {
 /** Device supports outer UDP checksum */
 #define DEV_TX_OFFLOAD_OUTER_UDP_CKSUM  0x00100000
 
+/** Device supports send on timestamp */
+#define DEV_TX_OFFLOAD_SEND_ON_TIMESTAMP 0x00200000
+
+
 #define RTE_ETH_DEV_CAPA_RUNTIME_RX_QUEUE_SETUP 0x00000001
 /**< Device supports Rx queue setup after device started*/
 #define RTE_ETH_DEV_CAPA_RUNTIME_TX_QUEUE_SETUP 0x00000002
diff --git a/lib/librte_mbuf/rte_mbuf_dyn.h b/lib/librte_mbuf/rte_mbuf_dyn.h
index 96c363137e..8407230ecf 100644
--- a/lib/librte_mbuf/rte_mbuf_dyn.h
+++ b/lib/librte_mbuf/rte_mbuf_dyn.h
@@ -250,4 +250,35 @@ void rte_mbuf_dyn_dump(FILE *out);
 #define RTE_MBUF_DYNFIELD_METADATA_NAME "rte_flow_dynfield_metadata"
 #define RTE_MBUF_DYNFLAG_METADATA_NAME "rte_flow_dynflag_metadata"
 
+/**
+ * The timestamp dynamic field provides some timing information, the
+ * units and time references (initial phase) are not explicitly defined
+ * but are maintained always the same for a given port. Some devices allow
+ * to query rte_eth_read_clock() that will return the current device
+ * timestamp. The dynamic Tx timestamp flag tells whether the field contains
+ * actual timestamp value for the packets being sent, this value can be
+ * used by PMD to schedule packet sending.
+ *
+ * After PKT_RX_TIMESTAMP flag and fixed timestamp field deprecation
+ * and obsoleting, the dedicated Rx timestamp flag is supposed to be
+ * introduced and the shared dynamic timestamp field will be used
+ * to handle the timestamps on receiving datapath as well.
+ */
+#define RTE_MBUF_DYNFIELD_TIMESTAMP_NAME "rte_dynfield_timestamp"
+
+/**
+ * When PMD sees the RTE_MBUF_DYNFLAG_TX_TIMESTAMP_NAME flag set on the
+ * packet being sent it tries to synchronize the time of packet appearing
+ * on the wire with the specified packet timestamp. If the specified one
+ * is in the past it should be ignored, if one is in the distant future
+ * it should be capped with some reasonable value (in range of seconds).
+ *
+ * There is no any packet reordering according to timestamps is supposed,
+ * neither for packet within the burst, nor for the whole bursts, it is
+ * an entirely application responsibility to generate packets and its
+ * timestamps in desired order. The timestamps might be put only in
+ * the first packet in the burst providing the entire burst scheduling.
+ */
+#define RTE_MBUF_DYNFLAG_TX_TIMESTAMP_NAME "rte_dynflag_tx_timestamp"
+
 #endif