diff --git a/item/event.go b/item/event.go
index 5faafa1..9ca7a47 100644
--- a/item/event.go
+++ b/item/event.go
@@ -103,6 +103,9 @@ func (e Event) Valid() bool {
 	if e.Duration.Seconds() < 1 {
 		return false
 	}
+	if e.Recur != nil && !e.Recur.Valid() {
+		return false
+	}
 
 	return true
 }
diff --git a/plan/command/argset.go b/plan/command/argset.go
index 138b80d..7e28c81 100644
--- a/plan/command/argset.go
+++ b/plan/command/argset.go
@@ -61,3 +61,15 @@ func (as *ArgSet) GetDuration(name string) time.Duration {
 	}
 	return val
 }
+
+func (as *ArgSet) GetPeriod(name string) Period {
+	flag, ok := as.Flags[name]
+	if !ok {
+		return Period("")
+	}
+	val, ok := flag.Get().(Period)
+	if !ok {
+		return Period("")
+	}
+	return val
+}
diff --git a/plan/command/command.go b/plan/command/command.go
index 5e74178..56b2fcd 100644
--- a/plan/command/command.go
+++ b/plan/command/command.go
@@ -7,10 +7,12 @@ import (
 )
 
 const (
-	FlagTitle = "title"
-	FlagOn    = "on"
-	FlagAt    = "at"
-	FlagFor   = "for"
+	FlagTitle     = "title"
+	FlagOn        = "on"
+	FlagAt        = "at"
+	FlagFor       = "for"
+	FlagRecStart  = "rec-start"
+	FlagRecPeriod = "rec-period"
 )
 
 type Command interface {
diff --git a/plan/command/flag.go b/plan/command/flag.go
index 979a1a8..a85d79f 100644
--- a/plan/command/flag.go
+++ b/plan/command/flag.go
@@ -3,6 +3,7 @@ package command
 import (
 	"errors"
 	"fmt"
+	"slices"
 	"time"
 )
 
@@ -107,3 +108,33 @@ func (fd *FlagDuration) IsSet() bool {
 func (fs *FlagDuration) Get() any {
 	return fs.Value
 }
+
+type Period string
+
+const (
+	PeriodDay   = "day"
+	PeriodMonth = "month"
+)
+
+var validPeriods = []Period{PeriodDay, PeriodMonth}
+
+type FlagPeriod struct {
+	Name  string
+	Value Period
+}
+
+func (fp *FlagPeriod) Set(val string) error {
+	if !slices.Contains(validPeriods, Period(val)) {
+		return fmt.Errorf("not a valid period: %v", val)
+	}
+	fp.Value = Period(val)
+	return nil
+}
+
+func (fp *FlagPeriod) IsSet() bool {
+	return fp.Value != ""
+}
+
+func (fp *FlagPeriod) Get() any {
+	return fp.Value
+}
diff --git a/plan/command/update.go b/plan/command/update.go
index 689159c..73fc2d2 100644
--- a/plan/command/update.go
+++ b/plan/command/update.go
@@ -6,6 +6,7 @@ import (
 	"strings"
 	"time"
 
+	"go-mod.ewintr.nl/planner/item"
 	"go-mod.ewintr.nl/planner/plan/storage"
 )
 
@@ -24,10 +25,12 @@ func NewUpdate(localIDRepo storage.LocalID, eventRepo storage.Event, syncRepo st
 		syncRepo:    syncRepo,
 		argSet: &ArgSet{
 			Flags: map[string]Flag{
-				FlagTitle: &FlagString{},
-				FlagOn:    &FlagDate{},
-				FlagAt:    &FlagTime{},
-				FlagFor:   &FlagDuration{},
+				FlagTitle:     &FlagString{},
+				FlagOn:        &FlagDate{},
+				FlagAt:        &FlagTime{},
+				FlagFor:       &FlagDuration{},
+				FlagRecStart:  &FlagDate{},
+				FlagRecPeriod: &FlagPeriod{},
 			},
 		},
 	}
@@ -103,6 +106,17 @@ func (update *Update) do() error {
 	if as.IsSet(FlagFor) {
 		e.Duration = as.GetDuration(FlagFor)
 	}
+	if as.IsSet(FlagRecStart) || as.IsSet(FlagRecPeriod) {
+		if e.Recurrer == nil {
+			e.Recurrer = *item.Recur{}
+		}
+		if as.IsSet(FlagRecStart) {
+			e.Recurrer.Start = as.GetTime(FlagRecStart)
+		}
+		if as.IsSet(FlagRecPeriod) {
+			e.Recurrer.Period = as.GetPeriod(FlagRecPeriod)
+		}
+	}
 
 	if !e.Valid() {
 		return fmt.Errorf("event is unvalid")