diff --git a/calendar/service.go b/calendar/service.go
index 1fadbfb..eda22b1 100644
--- a/calendar/service.go
+++ b/calendar/service.go
@@ -4,6 +4,7 @@ import (
 	"math/rand"
 	"time"
 
+	"github.com/gin-gonic/gin"
 	"kumoly.io/kumoly/app/server"
 	"kumoly.io/kumoly/app/store"
 	"kumoly.io/kumoly/app/util"
@@ -38,6 +39,18 @@ func (srv Service) Load() error {
 	calApi.PUT("", ApiCalUpdate)
 	calApi.DELETE("", ApiCalDelete)
 
+	//+-30day
+	calApi.GET("ics/:cid", func(c *gin.Context) {
+		cid := c.Param("cid")
+		ics, err := ICS(cid,
+			time.Now().Add(time.Hour*-720),
+			time.Now().Add(time.Hour*720))
+		if err != nil {
+			panic(err)
+		}
+		c.String(200, ics)
+	})
+
 	eventApi := server.API.Group("event")
 	eventApi.GET("", ApiEventQuery)
 	eventApi.POST("", ApiEventNew)