diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -301,6 +301,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
 
 *Libraries for working with dates and times.*
 
+* [go-persian-calendar](https://github.com/yaa110/go-persian-calendar) - The implementation of the Persian (Solar Hijri) Calendar in Go (golang).
 * [goweek](https://github.com/grsmv/goweek) - Library for working with week entity in golang.
 * [now](https://github.com/jinzhu/now) - Now is a time toolkit for golang.
 * [timeutil](https://github.com/leekchan/timeutil) - Useful extensions (Timedelta, Strftime, ...) to the golang's time package.