diff --git a/app/server/conversion/converters_default.go b/app/server/conversion/converters_default.go
index 34569deb..c06320fd 100644
--- a/app/server/conversion/converters_default.go
+++ b/app/server/conversion/converters_default.go
@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/phuslu/fasttime"
+
 	"github.com/ydb-platform/fq-connector-go/common"
 )
 
@@ -137,7 +139,7 @@ func (timestampToStringConverterUTC) Convert(in *time.Time) (string, error) {
 	// ClickHouse - 1 nanosecond  (10^-9 s)
 	// Oracle -  1 nanosecond  (10^-9 s)
 	// Trailing zeros are omitted
-	return in.UTC().Format("2006-01-02T15:04:05.999999999Z"), nil
+	return fasttime.Strftime("%Y-%m-%dT%H:%M:%S%N:z", in.UTC()), nil
 }
 
 type timestampToStringConverterNaive struct{}
diff --git a/go.mod b/go.mod
index 9cb9f618..bf479b33 100644
--- a/go.mod
+++ b/go.mod
@@ -72,6 +72,7 @@ require (
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/itchyny/timefmt-go v0.1.6
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
 	github.com/jackc/puddle/v2 v2.2.1 // indirect
@@ -79,10 +80,12 @@ require (
 	github.com/klauspost/asmfmt v1.3.2 // indirect
 	github.com/klauspost/compress v1.16.7 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.3 // indirect
+	github.com/lestrrat-go/strftime v1.1.0
 	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/minio/asm2plan9s v0.0.0-20200509001527-cdd76441f9d8 // indirect
 	github.com/minio/c2goasm v0.0.0-20190812172519-36a3d3bbc4f3 // indirect
 	github.com/paulmach/orb v0.11.1 // indirect
+	github.com/phuslu/fasttime v1.0.2
 	github.com/pierrec/lz4/v4 v4.1.18 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/segmentio/asm v1.2.0 // indirect
diff --git a/go.sum b/go.sum
index a9aabf7f..b4b74b4f 100644
--- a/go.sum
+++ b/go.sum
@@ -780,6 +780,8 @@ github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/itchyny/timefmt-go v0.1.6 h1:ia3s54iciXDdzWzwaVKXZPbiXzxxnv1SPGFfM/myJ5Q=
+github.com/itchyny/timefmt-go v0.1.6/go.mod h1:RRDZYC5s9ErkjQvTvvU7keJjxUYzIISJGxm9/mAERQg=
 github.com/jackc/pgerrcode v0.0.0-20220416144525-469b46aa5efa h1:s+4MhCQ6YrzisK6hFJUX53drDT4UsSW3DEhKn0ifuHw=
 github.com/jackc/pgerrcode v0.0.0-20220416144525-469b46aa5efa/go.mod h1:a/s9Lp5W7n/DD0VrVoyJ00FbP2ytTPDVOivvn2bMlds=
 github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
@@ -820,6 +822,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/lestrrat-go/strftime v1.1.0 h1:gMESpZy44/4pXLO/m+sL0yBd1W6LjgjrrD4a68Gapyg=
+github.com/lestrrat-go/strftime v1.1.0/go.mod h1:uzeIB52CeUJenCo1syghlugshMysrqUT51HlxphXVeI=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lyft/protoc-gen-star v0.6.0/go.mod h1:TGAoBVkt8w7MPG72TrKIu85MIdXwDuzJYeZuUPFPNwA=
 github.com/lyft/protoc-gen-star v0.6.1/go.mod h1:TGAoBVkt8w7MPG72TrKIu85MIdXwDuzJYeZuUPFPNwA=
@@ -842,6 +846,8 @@ github.com/paulmach/protoscan v0.2.1/go.mod h1:SpcSwydNLrxUGSDvXvO0P7g7AuhJ7lcKf
 github.com/phpdave11/gofpdf v1.4.2/go.mod h1:zpO6xFn9yxo3YLyMvW8HcKWVdbNqgIfOOp2dXMnm1mY=
 github.com/phpdave11/gofpdi v1.0.12/go.mod h1:vBmVV0Do6hSBHC8uKUQ71JGW+ZGQq74llk/7bXwjDoI=
 github.com/phpdave11/gofpdi v1.0.13/go.mod h1:vBmVV0Do6hSBHC8uKUQ71JGW+ZGQq74llk/7bXwjDoI=
+github.com/phuslu/fasttime v1.0.2 h1:gmD27yB6vnQuhk4vtmoBOmjaXsF+wwmyjMtayoHHUko=
+github.com/phuslu/fasttime v1.0.2/go.mod h1:1zflhZFowg3RSL0IpmWQ0AprKCKbTRKV9PEpVXDBZ7A=
 github.com/pierrec/lz4 v2.6.1+incompatible h1:9UY3+iC23yxF0UfGaYrGplQ+79Rg+h/q9FV9ix19jjM=
 github.com/pierrec/lz4 v2.6.1+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
 github.com/pierrec/lz4/v4 v4.1.15/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
diff --git a/tools/misc/bench/benchmark_time_formatting_test.go b/tools/misc/bench/benchmark_time_formatting_test.go
new file mode 100644
index 00000000..0c77097f
--- /dev/null
+++ b/tools/misc/bench/benchmark_time_formatting_test.go
@@ -0,0 +1,32 @@
+// go test -v -cpu=4 -run=none -bench=. -benchmem strftime_test.go
+package strftime_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/phuslu/fasttime"
+	"github.com/stretchr/testify/require"
+)
+
+var now = time.Now().UTC()
+
+func TestEquivalence(t *testing.T) {
+	std1 := now.Format(time.RFC3339Nano)
+	std2 := now.Format("2006-01-02T15:04:05.999999999Z")
+	fast := fasttime.Strftime("%Y-%m-%dT%H:%M:%S.%N%:z", now)
+	require.Equal(t, std1, fast)
+	require.Equal(t, std2, fast)
+}
+
+func BenchmarkRFC3339StdTime(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		now.Format(time.RFC3339Nano)
+	}
+}
+
+func BenchmarkRFC3339Fasttime(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		fasttime.Strftime("%Y-%m-%dT%H:%M:%S%N:z", now)
+	}
+}