diff --git a/README.md b/README.md
index 50776aa..71d335e 100644
--- a/README.md
+++ b/README.md
@@ -169,7 +169,7 @@ The following formats are supported as of right now:
 
 #### Tyme 3 JSON
 
-It's possible to import JSON exports from [Tyme 3](https://www.tyme-app.com). 
+It is possible to import JSON exports from [Tyme 3](https://www.tyme-app.com). 
 It is important that the JSON is exported with the following options set/unset:
 
 ![Tyme 3 JSON export](documentation/tyme3json.png)
@@ -194,3 +194,25 @@ Import a Tyme 3 JSON export:
 ```sh
 zeit import --tyme ./tyme.export.json
 ```
+
+### Export tracked activities
+
+```sh
+zeit export --help
+```
+
+The following formats are supported as of right now:
+
+#### Tyme 3 JSON
+
+It is possible to export JSON compatible to the Tyme 3 JSON format. Fields that
+are not available in *zeit* will be filled with dummy values, e.g.
+`Billing: "UNBILLED"`.
+
+#### Examples:
+
+Export a Tyme 3 JSON:
+
+```sh
+zeit export --tyme --project "my project" --since "2020-04-01T15:04:05+07:00" --until "2020-04-04T15:04:05+07:00"
+```
diff --git a/z/entry.go b/z/entry.go
index 0648e5a..dfb6b45 100644
--- a/z/entry.go
+++ b/z/entry.go
@@ -153,3 +153,29 @@ func (entry *Entry) GetOutput() (string) {
 
   return fmt.Sprintf("%s %s on %s from %s to %s (%sh)", color.FgGray.Render(entry.ID), color.FgLightWhite.Render(entry.Task), color.FgLightWhite.Render(entry.Project), color.FgLightWhite.Render(entry.Begin.Format("2006-01-02 15:04 -0700")), color.FgLightWhite.Render(entry.Finish.Format("2006-01-02 15:04 -0700")), color.FgLightWhite.Render(trackDiffOut.Format("15:04")))
 }
+
+func GetFilteredEntries(entries *[]Entry, project string, task string, since time.Time, until time.Time) ([]*Entry, error) {
+  var filteredEntries []*Entry
+
+  for _, entry := range *entries {
+    if project != "" && GetIdFromName(entry.Project) != GetIdFromName(project) {
+      continue
+    }
+
+    if task != "" && GetIdFromName(entry.Task) != GetIdFromName(task) {
+      continue
+    }
+
+    if since.IsZero() == false && since.Before(entry.Begin) == false && since.Equal(entry.Begin) == false {
+      continue
+    }
+
+    if until.IsZero() == false && until.After(entry.Finish) == false && until.Equal(entry.Finish) == false {
+      continue
+    }
+
+    filteredEntries = append(filteredEntries, &entry)
+  }
+
+  return filteredEntries, nil
+}
diff --git a/z/export.go b/z/export.go
index e1df5fc..c5066c3 100644
--- a/z/export.go
+++ b/z/export.go
@@ -3,11 +3,14 @@ package z
 import (
   "os"
   "fmt"
-  // "time"
+  "time"
   "github.com/spf13/cobra"
 )
 
-func exportTymeJson(user string, entries []Entry) (string, error) {
+var exportSince string
+var exportUntil string
+
+func exportTymeJson(user string, entries []*Entry) (string, error) {
 
     tyme := Tyme{}
     err := tyme.FromEntries(entries)
@@ -35,9 +38,35 @@ var exportCmd = &cobra.Command{
       os.Exit(1)
     }
 
+    var since time.Time
+    var until time.Time
+
+    if exportSince != "" {
+      since, err = time.Parse(time.RFC3339, exportSince)
+      if err != nil {
+        fmt.Printf("%s %+v\n", CharError, err)
+        os.Exit(1)
+      }
+    }
+
+    if exportUntil != "" {
+      until, err = time.Parse(time.RFC3339, exportUntil)
+      if err != nil {
+        fmt.Printf("%s %+v\n", CharError, err)
+        os.Exit(1)
+      }
+    }
+
+    var filteredEntries []*Entry
+    filteredEntries, err = GetFilteredEntries(&entries, project, task, since, until)
+    if err != nil {
+      fmt.Printf("%s %+v\n", CharError, err)
+      os.Exit(1)
+    }
+
     var output string = ""
     if formatTymeJson == true {
-      output, err = exportTymeJson(user, entries)
+      output, err = exportTymeJson(user, filteredEntries)
       if err != nil {
         fmt.Printf("%s %+v\n", CharError, err)
         os.Exit(1)
@@ -56,6 +85,10 @@ var exportCmd = &cobra.Command{
 func init() {
   rootCmd.AddCommand(exportCmd)
   exportCmd.Flags().BoolVar(&formatTymeJson, "tyme", false, "Export to Tyme 3 JSON")
+  exportCmd.Flags().StringVar(&exportSince, "since", "", "Date/time to start the export from")
+  exportCmd.Flags().StringVar(&exportUntil, "until", "", "Date/time to export until")
+  exportCmd.Flags().StringVarP(&project, "project", "p", "", "Project to be exported")
+  exportCmd.Flags().StringVarP(&task, "task", "t", "", "Task to be exported")
 
   var err error
   database, err = InitDatabase()
diff --git a/z/tyme.go b/z/tyme.go
index e0881cc..02d359d 100644
--- a/z/tyme.go
+++ b/z/tyme.go
@@ -5,7 +5,7 @@ import (
   // "fmt"
   "os"
   "github.com/shopspring/decimal"
-  // "time"
+  "time"
 )
 
 var formatTymeJson bool
@@ -50,7 +50,7 @@ func (tyme *Tyme) Load(filename string) error {
   return nil
 }
 
-func (tyme *Tyme) FromEntries(entries []Entry) error {
+func (tyme *Tyme) FromEntries(entries []*Entry) error {
   for _, entry := range entries {
     duration := decimal.NewFromFloat(entry.Finish.Sub(entry.Begin).Minutes())