diff --git a/Makefile b/Makefile
index 76af18d..862c50e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: usage build run test
+.PHONY: usage build test run tidy release release-all
 
 OK_COLOR=\033[32;01m
 NO_COLOR=\033[0m
@@ -10,7 +10,8 @@ BIN = git-sv
 
 ECHOFLAGS ?=
 
-VERSION ?= 
+BUILD_TIME = $(shell date +"%Y%m%d%H%M")
+VERSION ?= dev-$(BUILD_TIME)
 
 BUILDOS ?= linux
 BUILDARCH ?= amd64
diff --git a/README.md b/README.md
index c1aaf6b..98ecf29 100644
--- a/README.md
+++ b/README.md
@@ -42,30 +42,27 @@ git sv next-version
 
 #### Usage
 
+use `--help` or `-h` to get usage information, dont forget that some commands have unique options too
+
 ```bash
-NAME:
-   sv - semantic version for git
-
-USAGE:
-   git-sv [global options] command [command options] [arguments...]
-
-VERSION:
-   1.0.0
-
-COMMANDS:
-   current-version, cv  get last released version from git
-   next-version, nv     generate the next version based on git commit messages
-   commit-log, cl       list all commit logs since last version as jsons
-   release-notes, rn    generate release notes
-   tag, tg              generate tag with version based on git commit messages
-   help, h              Shows a list of commands or help for one command
-
-GLOBAL OPTIONS:
-   --help, -h     show help
-   --version, -v  print the version
+# sv help
+git-sv -h
 
+# sv release-notes command help
+git-sv rn -h
 ```
 
+##### Available commands
+
+| Variable | description |
+| --------- | ---------- |
+| current-version, cv | get last released version from git |
+| next-version, nv | generate the next version based on git commit messages |
+| commit-log, cl | list all commit logs since last version as jsons |
+| release-notes, rn | generate release notes |
+| tag, tg | generate tag with version based on git commit messages |
+| help, h | Shows a list of commands or help for one command |
+
 ## Development
 
 ### Makefile
diff --git a/cmd/git-sv/handlers.go b/cmd/git-sv/handlers.go
index bb9f0d8..7615184 100644
--- a/cmd/git-sv/handlers.go
+++ b/cmd/git-sv/handlers.go
@@ -4,8 +4,10 @@ import (
 	"encoding/json"
 	"fmt"
 	"sv4git/sv"
+	"time"
 
-	"github.com/urfave/cli"
+	"github.com/Masterminds/semver"
+	"github.com/urfave/cli/v2"
 )
 
 func currentVersionHandler(git sv.Git) func(c *cli.Context) error {
@@ -30,7 +32,7 @@ func nextVersionHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor) f
 			return fmt.Errorf("error parsing version: %s from describe, message: %v", describe, err)
 		}
 
-		commits, err := git.Log(describe)
+		commits, err := git.Log(describe, "")
 		if err != nil {
 			return fmt.Errorf("error getting git log, message: %v", err)
 		}
@@ -43,9 +45,14 @@ func nextVersionHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor) f
 
 func commitLogHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor) func(c *cli.Context) error {
 	return func(c *cli.Context) error {
-		describe := git.Describe()
+		var commits []sv.GitCommitLog
+		var err error
 
-		commits, err := git.Log(describe)
+		if tag := c.String("t"); tag != "" {
+			commits, err = getTagCommits(git, tag)
+		} else {
+			commits, err = git.Log(git.Describe(), "")
+		}
 		if err != nil {
 			return fmt.Errorf("error getting git log, message: %v", err)
 		}
@@ -61,29 +68,99 @@ func commitLogHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor) fun
 	}
 }
 
+func getTagCommits(git sv.Git, tag string) ([]sv.GitCommitLog, error) {
+	prev, _, err := getTags(git, tag)
+	if err != nil {
+		return nil, err
+	}
+	return git.Log(prev, tag)
+}
+
 func releaseNotesHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, rnProcessor sv.ReleaseNoteProcessor) func(c *cli.Context) error {
 	return func(c *cli.Context) error {
+		var commits []sv.GitCommitLog
+		var rnVersion semver.Version
+		var date time.Time
+		var err error
 
-		describe := git.Describe()
-
-		currentVer, err := sv.ToVersion(describe)
-		if err != nil {
-			return fmt.Errorf("error parsing version: %s from describe, message: %v", describe, err)
+		if tag := c.String("t"); tag != "" {
+			rnVersion, date, commits, err = getTagVersionInfo(git, semverProcessor, tag)
+		} else {
+			rnVersion, date, commits, err = getNextVersionInfo(git, semverProcessor)
 		}
 
-		commits, err := git.Log(describe)
 		if err != nil {
-			return fmt.Errorf("error getting git log, message: %v", err)
+			return err
 		}
 
-		nextVer := semverProcessor.NextVersion(currentVer, commits)
-
-		releasenote := rnProcessor.Get(commits)
-		fmt.Println(rnProcessor.Format(releasenote, nextVer))
+		releasenote := rnProcessor.Get(date, commits)
+		fmt.Println(rnProcessor.Format(releasenote, rnVersion))
 		return nil
 	}
 }
 
+func getTagVersionInfo(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, tag string) (semver.Version, time.Time, []sv.GitCommitLog, error) {
+	tagVersion, err := sv.ToVersion(tag)
+	if err != nil {
+		return semver.Version{}, time.Time{}, nil, fmt.Errorf("error parsing version: %s from tag, message: %v", tag, err)
+	}
+
+	previousTag, currentTag, err := getTags(git, tag)
+	if err != nil {
+		return semver.Version{}, time.Time{}, nil, fmt.Errorf("error listing tags, message: %v", err)
+	}
+
+	commits, err := git.Log(previousTag, tag)
+	if err != nil {
+		return semver.Version{}, time.Time{}, nil, fmt.Errorf("error getting git log from tag: %s, message: %v", tag, err)
+	}
+
+	return tagVersion, currentTag.Date, commits, nil
+}
+
+func getTags(git sv.Git, tag string) (string, sv.GitTag, error) {
+	tags, err := git.Tags()
+	if err != nil {
+		return "", sv.GitTag{}, err
+	}
+
+	index := find(tag, tags)
+	if index < 0 {
+		return "", sv.GitTag{}, fmt.Errorf("tag: %s not found", tag)
+	}
+
+	previousTag := ""
+	if index > 0 {
+		previousTag = tags[index-1].Name
+	}
+	return previousTag, tags[index], nil
+}
+
+func find(tag string, tags []sv.GitTag) int {
+	for i := 0; i < len(tags); i++ {
+		if tag == tags[i].Name {
+			return i
+		}
+	}
+	return -1
+}
+
+func getNextVersionInfo(git sv.Git, semverProcessor sv.SemVerCommitsProcessor) (semver.Version, time.Time, []sv.GitCommitLog, error) {
+	describe := git.Describe()
+
+	currentVer, err := sv.ToVersion(describe)
+	if err != nil {
+		return semver.Version{}, time.Time{}, nil, fmt.Errorf("error parsing version: %s from describe, message: %v", describe, err)
+	}
+
+	commits, err := git.Log(describe, "")
+	if err != nil {
+		return semver.Version{}, time.Time{}, nil, fmt.Errorf("error getting git log, message: %v", err)
+	}
+
+	return semverProcessor.NextVersion(currentVer, commits), time.Now(), commits, nil
+}
+
 func tagHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, rnProcessor sv.ReleaseNoteProcessor) func(c *cli.Context) error {
 	return func(c *cli.Context) error {
 		describe := git.Describe()
@@ -93,7 +170,7 @@ func tagHandler(git sv.Git, semverProcessor sv.SemVerCommitsProcessor, rnProcess
 			return fmt.Errorf("error parsing version: %s from describe, message: %v", describe, err)
 		}
 
-		commits, err := git.Log(describe)
+		commits, err := git.Log(describe, "")
 		if err != nil {
 			return fmt.Errorf("error getting git log, message: %v", err)
 		}
diff --git a/cmd/git-sv/main.go b/cmd/git-sv/main.go
index 6e8e8da..4bca52a 100644
--- a/cmd/git-sv/main.go
+++ b/cmd/git-sv/main.go
@@ -5,7 +5,7 @@ import (
 	"os"
 	"sv4git/sv"
 
-	"github.com/urfave/cli"
+	"github.com/urfave/cli/v2"
 )
 
 // Version for git-sv
@@ -22,7 +22,7 @@ func main() {
 	app.Name = "sv"
 	app.Version = Version
 	app.Usage = "semantic version for git"
-	app.Commands = []cli.Command{
+	app.Commands = []*cli.Command{
 		{
 			Name:    "current-version",
 			Aliases: []string{"cv"},
@@ -40,12 +40,14 @@ func main() {
 			Aliases: []string{"cl"},
 			Usage:   "list all commit logs since last version as jsons",
 			Action:  commitLogHandler(git, semverProcessor),
+			Flags:   []cli.Flag{&cli.StringFlag{Name: "t", Usage: "get commit log from tag"}},
 		},
 		{
 			Name:    "release-notes",
 			Aliases: []string{"rn"},
 			Usage:   "generate release notes",
 			Action:  releaseNotesHandler(git, semverProcessor, releasenotesProcessor),
+			Flags:   []cli.Flag{&cli.StringFlag{Name: "t", Usage: "get release note from tag"}},
 		},
 		{
 			Name:    "tag",
diff --git a/go.mod b/go.mod
index 3fdbad0..14bdc18 100644
--- a/go.mod
+++ b/go.mod
@@ -6,5 +6,5 @@ require (
 	github.com/Masterminds/semver v1.5.0
 	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
 	github.com/kelseyhightower/envconfig v1.4.0
-	github.com/urfave/cli v1.22.1
+	github.com/urfave/cli/v2 v2.1.1
 )
diff --git a/go.sum b/go.sum
index 30d1ebf..c3152d9 100644
--- a/go.sum
+++ b/go.sum
@@ -13,7 +13,7 @@ github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
-github.com/urfave/cli v1.22.1 h1:+mkCCcOFKPnCmVYVcURKps1Xe+3zP90gSYGNfRkjoIY=
-github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
+github.com/urfave/cli/v2 v2.1.1 h1:Qt8FeAtxE/vfdrLmR3rxR6JRE0RoVmbXu8+6kZtYU4k=
+github.com/urfave/cli/v2 v2.1.1/go.mod h1:SE9GqnLQmjVa0iPEY0f1w3ygNIYcIJ0OKPMoW2caLfQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/sv/git.go b/sv/git.go
index df5cfa9..67892d9 100644
--- a/sv/git.go
+++ b/sv/git.go
@@ -7,6 +7,7 @@ import (
 	"os/exec"
 	"regexp"
 	"strings"
+	"time"
 
 	"github.com/Masterminds/semver"
 )
@@ -21,8 +22,9 @@ const (
 // Git commands
 type Git interface {
 	Describe() string
-	Log(lastTag string) ([]GitCommitLog, error)
+	Log(initialTag, endTag string) ([]GitCommitLog, error)
 	Tag(version semver.Version) error
+	Tags() ([]GitTag, error)
 }
 
 // GitCommitLog description of a single commit log
@@ -35,6 +37,12 @@ type GitCommitLog struct {
 	Metadata map[string]string `json:"metadata,omitempty"`
 }
 
+// GitTag git tag info
+type GitTag struct {
+	Name string
+	Date time.Time
+}
+
 // GitImpl git command implementation
 type GitImpl struct {
 	messageMetadata map[string]string
@@ -57,11 +65,17 @@ func (GitImpl) Describe() string {
 }
 
 // Log return git log
-func (g GitImpl) Log(lastTag string) ([]GitCommitLog, error) {
+func (g GitImpl) Log(initialTag, endTag string) ([]GitCommitLog, error) {
 	format := "--pretty=format:\"%h" + logSeparator + "%s" + logSeparator + "%b" + endLine + "\""
-	cmd := exec.Command("git", "log", format)
-	if lastTag != "" {
-		cmd = exec.Command("git", "log", lastTag+"..HEAD", format)
+	var cmd *exec.Cmd
+	if initialTag == "" && endTag == "" {
+		cmd = exec.Command("git", "log", format)
+	} else if endTag == "" {
+		cmd = exec.Command("git", "log", initialTag+"..HEAD", format)
+	} else if initialTag == "" {
+		cmd = exec.Command("git", "log", endTag, format)
+	} else {
+		cmd = exec.Command("git", "log", initialTag+".."+endTag, format)
 	}
 
 	out, err := cmd.CombinedOutput()
@@ -85,6 +99,32 @@ func (g GitImpl) Tag(version semver.Version) error {
 	return pushCommand.Run()
 }
 
+// Tags list repository tags
+func (g GitImpl) Tags() ([]GitTag, error) {
+	cmd := exec.Command("git", "tag", "-l", "--format", "%(taggerdate:iso8601)#%(refname:short)")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return nil, err
+	}
+	return parseTagsOutput(string(out))
+}
+
+func parseTagsOutput(input string) ([]GitTag, error) {
+	scanner := bufio.NewScanner(strings.NewReader(input))
+	var result []GitTag
+	for scanner.Scan() {
+		if line := strings.TrimSpace(scanner.Text()); line != "" {
+			values := strings.Split(line, "#")
+			date, err := time.Parse("2006-01-02 15:04:05 -0700", values[0])
+			if err != nil {
+				return nil, fmt.Errorf("failed to parse tag data, message: %v", err)
+			}
+			result = append(result, GitTag{Name: values[1], Date: date})
+		}
+	}
+	return result, nil
+}
+
 func parseLogOutput(messageMetadata map[string]string, log string) []GitCommitLog {
 	scanner := bufio.NewScanner(strings.NewReader(log))
 	scanner.Split(splitAt([]byte(endLine)))
diff --git a/sv/helpers_test.go b/sv/helpers_test.go
index e6d2451..6d54f11 100644
--- a/sv/helpers_test.go
+++ b/sv/helpers_test.go
@@ -19,9 +19,9 @@ func commitlog(t string, metadata map[string]string) GitCommitLog {
 	}
 }
 
-func releaseNote(sections map[string]ReleaseNoteSection, breakingChanges []string) ReleaseNote {
+func releaseNote(date time.Time, sections map[string]ReleaseNoteSection, breakingChanges []string) ReleaseNote {
 	return ReleaseNote{
-		Date:            time.Now().Truncate(time.Minute),
+		Date:            date.Truncate(time.Minute),
 		Sections:        sections,
 		BreakingChanges: breakingChanges,
 	}
diff --git a/sv/releasenotes.go b/sv/releasenotes.go
index ef2a867..991c3a4 100644
--- a/sv/releasenotes.go
+++ b/sv/releasenotes.go
@@ -16,24 +16,24 @@ type releaseNoteTemplate struct {
 	BreakingChanges []string
 }
 
-const markdownTemplate = `# v{{.Version}} ({{.Date}})
+const markdownTemplate = `## v{{.Version}} ({{.Date}})
 
-{{if .Sections.feat}}## {{.Sections.feat.Name}}
+{{if .Sections.feat}}### {{.Sections.feat.Name}}
 {{range $k,$v := .Sections.feat.Items}}
 - {{if $v.Scope}}**{{$v.Scope}}:** {{end}}{{$v.Subject}} ({{$v.Hash}}) {{if $v.Metadata.issueid}}({{$v.Metadata.issueid}}){{end}}{{end}}{{end}}
 
-{{if .Sections.fix}}## {{.Sections.fix.Name}}
+{{if .Sections.fix}}### {{.Sections.fix.Name}}
 {{range $k,$v := .Sections.fix.Items}}
 - {{if $v.Scope}}**{{$v.Scope}}:** {{end}}{{$v.Subject}} ({{$v.Hash}}) {{if $v.Metadata.issueid}}({{$v.Metadata.issueid}}){{end}}{{end}}{{end}}
 
-{{if .BreakingChanges}}## Breaking Changes
+{{if .BreakingChanges}}### Breaking Changes
 {{range $k,$v := .BreakingChanges}}
 - {{$v}}{{end}}
 {{end}}`
 
 // ReleaseNoteProcessor release note processor interface.
 type ReleaseNoteProcessor interface {
-	Get(commits []GitCommitLog) ReleaseNote
+	Get(date time.Time, commits []GitCommitLog) ReleaseNote
 	Format(releasenote ReleaseNote, version semver.Version) string
 }
 
@@ -50,7 +50,7 @@ func NewReleaseNoteProcessor(tags map[string]string) *ReleaseNoteProcessorImpl {
 }
 
 // Get generate a release note based on commits.
-func (p ReleaseNoteProcessorImpl) Get(commits []GitCommitLog) ReleaseNote {
+func (p ReleaseNoteProcessorImpl) Get(date time.Time, commits []GitCommitLog) ReleaseNote {
 	sections := make(map[string]ReleaseNoteSection)
 	var breakingChanges []string
 	for _, commit := range commits {
@@ -67,7 +67,7 @@ func (p ReleaseNoteProcessorImpl) Get(commits []GitCommitLog) ReleaseNote {
 		}
 	}
 
-	return ReleaseNote{Date: time.Now().Truncate(time.Minute), Sections: sections, BreakingChanges: breakingChanges}
+	return ReleaseNote{Date: date.Truncate(time.Minute), Sections: sections, BreakingChanges: breakingChanges}
 }
 
 // Format format a release note.
diff --git a/sv/releasenotes_test.go b/sv/releasenotes_test.go
index b264b26..c65d063 100644
--- a/sv/releasenotes_test.go
+++ b/sv/releasenotes_test.go
@@ -3,34 +3,41 @@ package sv
 import (
 	"reflect"
 	"testing"
+	"time"
 )
 
 func TestReleaseNoteProcessorImpl_Get(t *testing.T) {
+	date := time.Now()
+
 	tests := []struct {
 		name    string
+		date    time.Time
 		commits []GitCommitLog
 		want    ReleaseNote
 	}{
 		{
 			name:    "mapped tag",
+			date:    date,
 			commits: []GitCommitLog{commitlog("t1", map[string]string{})},
-			want:    releaseNote(map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, nil),
+			want:    releaseNote(date, map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, nil),
 		},
 		{
 			name:    "unmapped tag",
+			date:    date,
 			commits: []GitCommitLog{commitlog("t1", map[string]string{}), commitlog("unmapped", map[string]string{})},
-			want:    releaseNote(map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, nil),
+			want:    releaseNote(date, map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, nil),
 		},
 		{
 			name:    "breaking changes tag",
+			date:    date,
 			commits: []GitCommitLog{commitlog("t1", map[string]string{}), commitlog("unmapped", map[string]string{"breakingchange": "breaks"})},
-			want:    releaseNote(map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, []string{"breaks"}),
+			want:    releaseNote(date, map[string]ReleaseNoteSection{"t1": rnSection("Tag 1", []GitCommitLog{commitlog("t1", map[string]string{})})}, []string{"breaks"}),
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			p := NewReleaseNoteProcessor(map[string]string{"t1": "Tag 1", "t2": "Tag 2"})
-			if got := p.Get(tt.commits); !reflect.DeepEqual(got, tt.want) {
+			if got := p.Get(tt.date, tt.commits); !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("ReleaseNoteProcessorImpl.Get() = %v, want %v", got, tt.want)
 			}
 		})