diff --git a/internal/bot/calendar.go b/internal/bot/calendar.go
index 24f4320..ec6b585 100644
--- a/internal/bot/calendar.go
+++ b/internal/bot/calendar.go
@@ -361,7 +361,7 @@ func buildHourPickerKeyboard(cb func(int) string, backData string) models.Inline
 func buildMinutePickerKeyboard(cb func(int) string, backData string) models.InlineKeyboardMarkup {
 	kbRows := [][]models.InlineKeyboardButton{}
 	minRow := []models.InlineKeyboardButton{}
-	for _, mm := range []int{0, 15, 30, 45} {
+	for _, mm := range []int{0, 10, 20, 30, 40, 50} {
 		minRow = append(minRow, models.InlineKeyboardButton{
 			Text: fmt.Sprintf("%02d", mm), CallbackData: cb(mm),
 		})