diff --git a/gnu/packages/calendar.scm b/gnu/packages/calendar.scm
index 8ec36d4fa2..4c54ac0549 100644
--- a/gnu/packages/calendar.scm
+++ b/gnu/packages/calendar.scm
@@ -10,6 +10,7 @@
;;; Copyright © 2020 Brendan Tildesley <mail@brendan.scot>
;;; Copyright © 2020 Tanguy Le Carrour <tanguy@bioneland.org>
;;; Copyright © 2020 Peng Mei Yu <pengmeiyu@riseup.net>
+;;; Copyright © 2021 Wamm K. D. <jaft.r@outlook.com>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -36,6 +37,7 @@ (define-module (gnu packages calendar)
#:use-module (guix build-system cmake)
#:use-module (guix build-system python)
#:use-module (gnu packages admin)
+ #:use-module (gnu packages autotools)
#:use-module (gnu packages base)
#:use-module (gnu packages check)
#:use-module (gnu packages dav)
@@ -405,3 +407,31 @@ (define-public ccal
;; COPYING.LESSER specifies LGPL 3.0, but all source files say
;; 'Lesser GPL version 2 or later'.
(license (list license:gpl2+ license:lgpl2.1+))))
+
+(define-public gsimplecal
+ (let ([commit "f00b80d86300397b52c3cf7d8dfc8de5cdee921d"]
+ [revision "1"])
+ (package
+ (name "gsimplecal")
+ (version (git-version "2.2" revision commit))
+ (source (origin
+ (method git-fetch)
+ (uri (git-reference
+ (url "https://github.com/dmedvinsky/gsimplecal/")
+ (commit commit)))
+ (file-name (git-file-name name version))
+ (sha256 (base32 (string-append/shared
+ "1qyf65l088dqsz25hm6s1cv18j"
+ "52yaias0llqvpqwjfnvssa5cxg")))
+ (modules '((guix build utils)))))
+ (build-system gnu-build-system)
+ (native-inputs `(("autoconf" ,autoconf)
+ ("automake" ,automake)
+ ("pkg-config" ,pkg-config)
+ ("gtk+" ,gtk+)))
+ (home-page "https://dmedvinsky.github.io/gsimplecal/")
+ (synopsis "Lightweight calendar applet written in C++ using GTK")
+ (description "Gsimplecal was intentionally made for use with tint2 panel
+in the openbox environment to be launched upon clock click but, of course, it
+will work without it.")
+ (license license:bsd-3))))