diff --git a/api/data/lifecycle.go b/api/data/lifecycle.go
index cb3c7cb..4d0828f 100644
--- a/api/data/lifecycle.go
+++ b/api/data/lifecycle.go
@@ -27,9 +27,10 @@ type (
 	}
 
 	LifecycleExpiration struct {
-		Date                      string `xml:"Date,omitempty"`
-		Days                      *int   `xml:"Days,omitempty"`
-		ExpiredObjectDeleteMarker *bool  `xml:"ExpiredObjectDeleteMarker,omitempty"`
+		Date                      string  `xml:"Date,omitempty"`
+		Days                      *int    `xml:"Days,omitempty"`
+		Epoch                     *uint64 `xml:"Epoch,omitempty"`
+		ExpiredObjectDeleteMarker *bool   `xml:"ExpiredObjectDeleteMarker,omitempty"`
 	}
 
 	LifecycleRuleFilter struct {
diff --git a/api/handler/lifecycle.go b/api/handler/lifecycle.go
index 93fe2cc..88e96cf 100644
--- a/api/handler/lifecycle.go
+++ b/api/handler/lifecycle.go
@@ -1,9 +1,9 @@
 package handler
 
 import (
-	"bytes"
+	"context"
+	"encoding/base64"
 	"fmt"
-	"io"
 	"net/http"
 	"time"
 
@@ -12,6 +12,8 @@ import (
 	apierr "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/util"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 )
 
 const (
@@ -43,9 +45,6 @@ func (h *handler) GetBucketLifecycleHandler(w http.ResponseWriter, r *http.Reque
 }
 
 func (h *handler) PutBucketLifecycleHandler(w http.ResponseWriter, r *http.Request) {
-	var buf bytes.Buffer
-
-	tee := io.TeeReader(r.Body, &buf)
 	ctx := r.Context()
 	reqInfo := middleware.GetReqInfo(ctx)
 
@@ -56,6 +55,11 @@ func (h *handler) PutBucketLifecycleHandler(w http.ResponseWriter, r *http.Reque
 		return
 	}
 
+	if _, err := base64.StdEncoding.DecodeString(r.Header.Get(api.ContentMD5)); err != nil {
+		h.logAndSendError(w, "invalid Content-MD5", reqInfo, apierr.GetAPIError(apierr.ErrInvalidDigest))
+		return
+	}
+
 	bktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName)
 	if err != nil {
 		h.logAndSendError(w, "could not get bucket info", reqInfo, err)
@@ -63,21 +67,25 @@ func (h *handler) PutBucketLifecycleHandler(w http.ResponseWriter, r *http.Reque
 	}
 
 	cfg := new(data.LifecycleConfiguration)
-	if err = h.cfg.NewXMLDecoder(tee).Decode(cfg); err != nil {
+	if err = h.cfg.NewXMLDecoder(r.Body).Decode(cfg); err != nil {
 		h.logAndSendError(w, "could not decode body", reqInfo, fmt.Errorf("%w: %s", apierr.GetAPIError(apierr.ErrMalformedXML), err.Error()))
 		return
 	}
 
-	if err = checkLifecycleConfiguration(cfg); err != nil {
+	networkInfo, err := h.obj.GetNetworkInfo(ctx)
+	if err != nil {
+		h.logAndSendError(w, "could not get network info", reqInfo, err)
+		return
+	}
+
+	if err = checkLifecycleConfiguration(ctx, cfg, &networkInfo); err != nil {
 		h.logAndSendError(w, "invalid lifecycle configuration", reqInfo, fmt.Errorf("%w: %s", apierr.GetAPIError(apierr.ErrMalformedXML), err.Error()))
 		return
 	}
 
 	params := &layer.PutBucketLifecycleParams{
-		BktInfo:         bktInfo,
-		LifecycleCfg:    cfg,
-		LifecycleReader: &buf,
-		MD5Hash:         r.Header.Get(api.ContentMD5),
+		BktInfo:      bktInfo,
+		LifecycleCfg: cfg,
 	}
 
 	params.CopiesNumbers, err = h.pickCopiesNumbers(parseMetadata(r), reqInfo.Namespace, bktInfo.LocationConstraint)
@@ -110,13 +118,15 @@ func (h *handler) DeleteBucketLifecycleHandler(w http.ResponseWriter, r *http.Re
 	w.WriteHeader(http.StatusNoContent)
 }
 
-func checkLifecycleConfiguration(cfg *data.LifecycleConfiguration) error {
+func checkLifecycleConfiguration(ctx context.Context, cfg *data.LifecycleConfiguration, ni *netmap.NetworkInfo) error {
+	now := layer.TimeNow(ctx)
+
 	if len(cfg.Rules) > maxRules {
 		return fmt.Errorf("number of rules cannot be greater than %d", maxRules)
 	}
 
 	ids := make(map[string]struct{}, len(cfg.Rules))
-	for _, rule := range cfg.Rules {
+	for i, rule := range cfg.Rules {
 		if _, ok := ids[rule.ID]; ok && rule.ID != "" {
 			return fmt.Errorf("duplicate 'ID': %s", rule.ID)
 		}
@@ -160,8 +170,18 @@ func checkLifecycleConfiguration(cfg *data.LifecycleConfiguration) error {
 				return fmt.Errorf("expiration days must be a positive integer: %d", *rule.Expiration.Days)
 			}
 
-			if _, err := time.Parse("2006-01-02T15:04:05Z", rule.Expiration.Date); rule.Expiration.Date != "" && err != nil {
-				return fmt.Errorf("invalid value of expiration date: %s", rule.Expiration.Date)
+			if rule.Expiration.Date != "" {
+				parsedTime, err := time.Parse("2006-01-02T15:04:05Z", rule.Expiration.Date)
+				if err != nil {
+					return fmt.Errorf("invalid value of expiration date: %s", rule.Expiration.Date)
+				}
+
+				epoch, err := util.TimeToEpoch(ni, now, parsedTime)
+				if err != nil {
+					return fmt.Errorf("convert time to epoch: %w", err)
+				}
+
+				cfg.Rules[i].Expiration.Epoch = &epoch
 			}
 		}
 
diff --git a/api/handler/lifecycle_test.go b/api/handler/lifecycle_test.go
index 77aef64..8cba0fc 100644
--- a/api/handler/lifecycle_test.go
+++ b/api/handler/lifecycle_test.go
@@ -376,11 +376,6 @@ func TestPutBucketLifecycleInvalidMD5(t *testing.T) {
 	hc.Handler().PutBucketLifecycleHandler(w, r)
 	assertS3Error(hc.t, w, apierr.GetAPIError(apierr.ErrMissingContentMD5))
 
-	w, r = prepareTestRequest(hc, bktName, "", lifecycle)
-	r.Header.Set(api.ContentMD5, "")
-	hc.Handler().PutBucketLifecycleHandler(w, r)
-	assertS3Error(hc.t, w, apierr.GetAPIError(apierr.ErrInvalidDigest))
-
 	w, r = prepareTestRequest(hc, bktName, "", lifecycle)
 	r.Header.Set(api.ContentMD5, "some-hash")
 	hc.Handler().PutBucketLifecycleHandler(w, r)
diff --git a/api/layer/frostfs_mock.go b/api/layer/frostfs_mock.go
index 3039509..1b29fca 100644
--- a/api/layer/frostfs_mock.go
+++ b/api/layer/frostfs_mock.go
@@ -413,6 +413,8 @@ func (t *TestFrostFS) SearchObjects(_ context.Context, prm frostfs.PrmObjectSear
 func (t *TestFrostFS) NetworkInfo(context.Context) (netmap.NetworkInfo, error) {
 	ni := netmap.NetworkInfo{}
 	ni.SetCurrentEpoch(t.currentEpoch)
+	ni.SetEpochDuration(60)
+	ni.SetMsPerBlock(1000)
 
 	return ni, nil
 }
diff --git a/api/layer/lifecycle.go b/api/layer/lifecycle.go
index 8901cc6..f16aded 100644
--- a/api/layer/lifecycle.go
+++ b/api/layer/lifecycle.go
@@ -3,11 +3,9 @@ package layer
 import (
 	"bytes"
 	"context"
-	"encoding/base64"
 	"encoding/xml"
 	"errors"
 	"fmt"
-	"io"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	apierr "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
@@ -19,16 +17,19 @@ import (
 )
 
 type PutBucketLifecycleParams struct {
-	BktInfo         *data.BucketInfo
-	LifecycleCfg    *data.LifecycleConfiguration
-	LifecycleReader io.Reader
-	CopiesNumbers   []uint32
-	MD5Hash         string
+	BktInfo       *data.BucketInfo
+	LifecycleCfg  *data.LifecycleConfiguration
+	CopiesNumbers []uint32
 }
 
 func (n *Layer) PutBucketLifecycleConfiguration(ctx context.Context, p *PutBucketLifecycleParams) error {
+	cfgBytes, err := xml.Marshal(p.LifecycleCfg)
+	if err != nil {
+		return fmt.Errorf("marshal lifecycle configuration: %w", err)
+	}
+
 	prm := frostfs.PrmObjectCreate{
-		Payload:      p.LifecycleReader,
+		Payload:      bytes.NewReader(cfgBytes),
 		Filepath:     p.BktInfo.LifecycleConfigurationObjectName(),
 		CreationTime: TimeNow(ctx),
 	}
@@ -49,17 +50,6 @@ func (n *Layer) PutBucketLifecycleConfiguration(ctx context.Context, p *PutBucke
 		return fmt.Errorf("put lifecycle object: %w", err)
 	}
 
-	hashBytes, err := base64.StdEncoding.DecodeString(p.MD5Hash)
-	if err != nil {
-		return apierr.GetAPIError(apierr.ErrInvalidDigest)
-	}
-
-	if !bytes.Equal(hashBytes, createdObj.MD5Sum) {
-		n.deleteLifecycleObject(ctx, p.BktInfo, newAddress(lifecycleBkt.CID, createdObj.ID))
-
-		return apierr.GetAPIError(apierr.ErrInvalidDigest)
-	}
-
 	objsToDelete, err := n.treeService.PutBucketLifecycleConfiguration(ctx, p.BktInfo, newAddress(lifecycleBkt.CID, createdObj.ID))
 	objsToDeleteNotFound := errors.Is(err, tree.ErrNoNodeToRemove)
 	if err != nil && !objsToDeleteNotFound {
@@ -129,6 +119,12 @@ func (n *Layer) GetBucketLifecycleConfiguration(ctx context.Context, bktInfo *da
 
 	n.cache.PutLifecycleConfiguration(owner, bktInfo, lifecycleCfg)
 
+	for i := range lifecycleCfg.Rules {
+		if lifecycleCfg.Rules[i].Expiration != nil {
+			lifecycleCfg.Rules[i].Expiration.Epoch = nil
+		}
+	}
+
 	return lifecycleCfg, nil
 }
 
diff --git a/api/layer/lifecycle_test.go b/api/layer/lifecycle_test.go
index 0e9be8f..b45c7fe 100644
--- a/api/layer/lifecycle_test.go
+++ b/api/layer/lifecycle_test.go
@@ -1,9 +1,7 @@
 package layer
 
 import (
-	"bytes"
 	"crypto/md5"
-	"encoding/base64"
 	"encoding/xml"
 	"testing"
 
@@ -42,10 +40,8 @@ func TestBucketLifecycle(t *testing.T) {
 	require.NoError(t, err)
 
 	err = tc.layer.PutBucketLifecycleConfiguration(tc.ctx, &PutBucketLifecycleParams{
-		BktInfo:         tc.bktInfo,
-		LifecycleCfg:    lifecycle,
-		LifecycleReader: bytes.NewReader(lifecycleBytes),
-		MD5Hash:         base64.StdEncoding.EncodeToString(hash.Sum(nil)),
+		BktInfo:      tc.bktInfo,
+		LifecycleCfg: lifecycle,
 	})
 	require.NoError(t, err)
 
diff --git a/internal/frostfs/frostfs.go b/internal/frostfs/frostfs.go
index 95ac17b..03f8a7f 100644
--- a/internal/frostfs/frostfs.go
+++ b/internal/frostfs/frostfs.go
@@ -5,13 +5,13 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"math"
 	"strconv"
 	"time"
 
 	objectv2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
 	frosterr "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/util"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@@ -54,8 +54,7 @@ func NewFrostFS(p *pool.Pool, key *keys.PrivateKey) *FrostFS {
 
 // TimeToEpoch implements layer.FrostFS interface method.
 func (x *FrostFS) TimeToEpoch(ctx context.Context, now, futureTime time.Time) (uint64, uint64, error) {
-	dur := futureTime.Sub(now)
-	if dur < 0 {
+	if futureTime.Before(now) {
 		return 0, 0, fmt.Errorf("time '%s' must be in the future (after %s)",
 			futureTime.Format(time.RFC3339), now.Format(time.RFC3339))
 	}
@@ -65,27 +64,12 @@ func (x *FrostFS) TimeToEpoch(ctx context.Context, now, futureTime time.Time) (u
 		return 0, 0, handleObjectError("get network info via client", err)
 	}
 
-	durEpoch := networkInfo.EpochDuration()
-	if durEpoch == 0 {
-		return 0, 0, errors.New("epoch duration is missing or zero")
+	epoch, err := util.TimeToEpoch(&networkInfo, now, futureTime)
+	if err != nil {
+		return 0, 0, err
 	}
 
-	curr := networkInfo.CurrentEpoch()
-	msPerEpoch := durEpoch * uint64(networkInfo.MsPerBlock())
-
-	epochLifetime := uint64(dur.Milliseconds()) / msPerEpoch
-	if uint64(dur.Milliseconds())%msPerEpoch != 0 {
-		epochLifetime++
-	}
-
-	var epoch uint64
-	if epochLifetime >= math.MaxUint64-curr {
-		epoch = math.MaxUint64
-	} else {
-		epoch = curr + epochLifetime
-	}
-
-	return curr, epoch, nil
+	return networkInfo.CurrentEpoch(), epoch, nil
 }
 
 // Container implements layer.FrostFS interface method.
diff --git a/internal/frostfs/util/util.go b/internal/frostfs/util/util.go
index 444504b..00a9905 100644
--- a/internal/frostfs/util/util.go
+++ b/internal/frostfs/util/util.go
@@ -2,9 +2,12 @@ package util
 
 import (
 	"fmt"
+	"math"
 	"strings"
+	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/ns"
 	"github.com/nspcc-dev/neo-go/pkg/util"
 )
@@ -32,3 +35,39 @@ func ResolveContractHash(contractHash, rpcAddress string) (util.Uint160, error)
 
 	return nns.ResolveContractHash(domain)
 }
+
+func TimeToEpoch(ni *netmap.NetworkInfo, now, t time.Time) (uint64, error) {
+	duration := t.Sub(now)
+	durationAbs := duration.Abs()
+
+	durEpoch := ni.EpochDuration()
+	if durEpoch == 0 {
+		return 0, fmt.Errorf("epoch duration is missing or zero")
+	}
+
+	msPerEpoch := durEpoch * uint64(ni.MsPerBlock())
+	epochLifetime := uint64(durationAbs.Milliseconds()) / msPerEpoch
+
+	if uint64(durationAbs.Milliseconds())%msPerEpoch != 0 {
+		epochLifetime++
+	}
+
+	curr := ni.CurrentEpoch()
+
+	var epoch uint64
+	if duration > 0 {
+		if epochLifetime >= math.MaxUint64-curr {
+			epoch = math.MaxUint64
+		} else {
+			epoch = curr + epochLifetime
+		}
+	} else {
+		if epochLifetime >= curr {
+			epoch = 0
+		} else {
+			epoch = curr - epochLifetime
+		}
+	}
+
+	return epoch, nil
+}
diff --git a/internal/frostfs/util/util_test.go b/internal/frostfs/util/util_test.go
new file mode 100644
index 0000000..92bcdff
--- /dev/null
+++ b/internal/frostfs/util/util_test.go
@@ -0,0 +1,44 @@
+package util
+
+import (
+	"testing"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
+	"github.com/stretchr/testify/require"
+)
+
+func TestTimeToEpoch(t *testing.T) {
+	ni := netmap.NetworkInfo{}
+	ni.SetCurrentEpoch(10)
+
+	_, err := TimeToEpoch(&ni, time.Now(), time.Now())
+	require.Error(t, err)
+
+	ni.SetEpochDuration(60)
+	ni.SetMsPerBlock(1000)
+
+	epoch, err := TimeToEpoch(&ni, time.Now(), time.Now())
+	require.NoError(t, err)
+	require.Equal(t, uint64(10), epoch)
+
+	epoch, err = TimeToEpoch(&ni, time.Now(), time.Now().Add(30*time.Second))
+	require.NoError(t, err)
+	require.Equal(t, uint64(11), epoch)
+
+	epoch, err = TimeToEpoch(&ni, time.Now(), time.Now().Add(90*time.Second))
+	require.NoError(t, err)
+	require.Equal(t, uint64(12), epoch)
+
+	epoch, err = TimeToEpoch(&ni, time.Now(), time.Now().Add(-30*time.Second))
+	require.NoError(t, err)
+	require.Equal(t, uint64(9), epoch)
+
+	epoch, err = TimeToEpoch(&ni, time.Now(), time.Now().Add(-90*time.Second))
+	require.NoError(t, err)
+	require.Equal(t, uint64(8), epoch)
+
+	epoch, err = TimeToEpoch(&ni, time.Now(), time.Now().Add(-10*time.Minute))
+	require.NoError(t, err)
+	require.Equal(t, uint64(0), epoch)
+}