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))))