How to check if two RRules overlapping

[suren4Kites]

If I have one RRule for weekly and another for monthly. Is there any way that I can check whether overlapping is possible?

[zensh]

package main

import (
	"fmt"

	"github.com/teambition/rrule-go"
)

func main() {
	r1, _ := rrule.StrToRRule("FREQ=DAILY;DTSTART=19970902T015959Z;COUNT=1000")
	r2, _ := rrule.StrToRRule("FREQ=DAILY;DTSTART=19980902T015959Z;COUNT=100")
	all := r1.All()
	cur := 0
	iter := r2.Iterator()

	for {
		val, ok := iter()
		if !ok {
			break
		}

		for {
			if cur >= len(all) {
				break
			}

			if val.After(all[cur]) {
				cur++
				continue
			} else if val.Equal(all[cur]) {
				fmt.Println("overlapping ", val)
				cur++
			}

			break
		}
	}
}