diff --git a/flake.nix b/flake.nix
index 443d6ab..47bb495 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,15 +4,81 @@
     let
       pkgs = nixpkgs.legacyPackages.x86_64-linux;
       my-python = pkgs.python3;
+      tkcalendar = pkgs.python3Packages.buildPythonPackage rec {
+        pname = "tkcalendar";
+        version = "1.6.1";
+
+        src = pkgs.fetchFromGitHub {
+          owner = "j4321";
+          repo = "tkcalendar";
+          rev = "v${version}";
+          sha256 = "Z5Sg1kT9VS0WNyJ3nXXhKbzL1VEXwkbF4bV8OwprYfE=";
+        };
+
+        propagatedBuildInputs = [
+          pkgs.python310Packages.tkinter
+          pkgs.python310Packages.babel
+        ];
+
+        doCheck = false;
+        pythonImportsCheck = [ "tkcalendar" ];
+      };
+
+      calcure = pkgs.python3Packages.buildPythonApplication rec {
+        pname = "calcure";
+        version = "2.6";
+
+        src = pkgs.fetchFromGitHub {
+          owner = "anufrievroman";
+          repo = "calcure";
+          rev = "${version}";
+          sha256 = "VvK8kLQd8JKaLQoxtMbweOKnR9nKMEnlj0103DeLXRI=";
+        };
+
+        propagatedBuildInputs = [
+          pkgs.python310Packages.holidays
+          pkgs.python310Packages.jdatetime
+        ];
+
+        # doCheck = false;
+      };
+
+      ttkbootstrap = pkgs.python3Packages.buildPythonPackage rec {
+        pname = "ttkbootstrap";
+        version = "1.10.0";
+
+        src = pkgs.fetchFromGitHub {
+          owner = "israel-dryer";
+          repo = "ttkbootstrap";
+          rev = "v${version}";
+          sha256 = "tWzpgNv54uuB9hntO/iek6zrH4RWk9MrREXdwpDRDPw=";
+        };
+
+        propagatedBuildInputs = [
+          pkgs.python310Packages.pillow
+          pkgs.python310Packages.tkinter
+        ];
+
+        # doCheck = false;
+        pythonImportsCheck = [ "ttkbootstrap" ];
+      };
+
       python-with-my-packages = my-python.withPackages (p: with p; [
         tkinter
+        tkcalendar
+        ttkbootstrap
+        ical
       ]);
     in
     {
+      packages.tkcalendar = pkgs.callPackage tkcalendar { };
+      packages.ttkbootsrap = pkgs.callPackage ttkbootstrap { };
+      packages.calcure = pkgs.callPackage calcure { };
       devShell.x86_64-linux = pkgs.mkShell {
         buildInputs = with pkgs; [
           yad
           python-with-my-packages
+          calcure
         ];
       };
     };
diff --git a/tkinter-caldav-calendar.py b/tkinter-caldav-calendar.py
index 40209a4..4cd4867 100644
--- a/tkinter-caldav-calendar.py
+++ b/tkinter-caldav-calendar.py
@@ -1,54 +1,66 @@
 from tkinter import *
 from tkinter import ttk
-import sys
-import subprocess
+from pydantic import ValidationError
+from tkcalendar import Calendar
+from datetime import datetime
+from os import listdir
+from ical.calendar_stream import IcsCalendarStream
 
-calendar = subprocess.check_output(["cal", "-m"])
-calendar = calendar.decode("utf-8")
-calendar = calendar.split("\n")
-calendar = [x.split() for x in calendar]
+# Later on...
+# Import all ICS events into Tkinter Events
+# for e in c.events:
+#     print(e.name)
 
-today = subprocess.check_output(["date", "+\"%d\""])
-today = today.decode("utf-8")[:-1]
-today = today.strip("\"")
-
-month_year = calendar[0]
-calendar_fields = [calendar[1], calendar[2], calendar[3], calendar[4], calendar[5], calendar[6]]
+### TKINTER Setup
 
 root = Tk()
-root.geometry("+0+0")
-root.attributes("-type", "dialog")
+root.geometry("+0+0") # TODO set location of tkinter dialog
+root.attributes("-type", "dialog") 
+
+style = ttk.Style(root)
+style.theme_use("clam")
 
 frame = ttk.Frame(root)
 frame.grid()
 
-date_label = ttk.Label(frame, text=" ".join(month_year)).grid(row=0, columnspan=7)
-prev_month_button = ttk.Button(frame, text="<", command=exit, width=1).grid(row=0, column=0)
-next_month_button = ttk.Button(frame, text=">", command=exit, width=1).grid(row=0, column=6)
+calendar = Calendar(frame)
+calendar.grid(row=0,columnspan=7)
+calendar.calevent_create(date=datetime(2022, 12, 16), text="today")
 
-def get_agenda(date):
-    date = "2022-12-" + date
-    agenda = subprocess.check_output(["khal", "list", date, date])
-    agenda = agenda.decode("utf-8")[:-1]
-    agenda = agenda.split("\n")[1]
-    return agenda
+### ICS setup
 
+# List calendar folder (~/.calendar/)
+calendar_folder = '/home/anish/.calendar/'
+# Recurse through each folder
+for c in listdir(calendar_folder):
+    files = listdir(calendar_folder + c)
+    full_text: str = ""
+    for file in files:
+        try:
+            with open(calendar_folder + c + "/" + file, 'r') as in_file:
+                cal = IcsCalendarStream.calendar_from_ics(in_file.read())
+                for e in cal.events:
+                    calendar.calevent_create(date=e.dtstart, text=e.summary)
+        except ValidationError:
+            print(f"Could not parse file: {calendar_folder}{c}")
 
-row_count = 1
-column_count = 0
-for r in calendar_fields:
-    for c in r:
-        if c == today:
-            label = ttk.Label(frame, text=c, background="green").grid(row=row_count, column=column_count)
-        else:
-            label = ttk.Label(frame, text=c).grid(row=row_count, column=column_count)
-        column_count += 1
-    column_count = 0
-    row_count += 1
+agenda_var = StringVar()
+agenda_var.set("")
 
-agenda_label = ttk.Label(frame, text=get_agenda(today)).grid(row=row_count+1, columnspan=7)
+def update_agenda(_):
+    date = calendar.selection_get()
+    new_agenda = calendar.get_calevents(date)
+    if new_agenda:
+        new_agenda = calendar.calevent_cget(new_agenda[0], "text") # TODO list *all* events
+        agenda_var.set(new_agenda)
+        root.update_idletasks()
+    else:
+        agenda_var.set("")
 
-def exit():
-    sys.exit()
+agenda_label = ttk.Label(frame, textvariable=agenda_var)
+agenda_label.grid(rowspan=13, columnspan=7) # TODO make agenda bigger to accomodate multiple events
+
+update_agenda("") # initial set of agenda
+root.bind("<<CalendarSelected>>", update_agenda)
 
 root.mainloop()