diff --git a/README.md b/README.md
index f53f20b..2a35f17 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,10 @@ Call the script and pass in the location of the ics file.
 
 Ex: `python ical2txt.py event.ics` / `python3 ical2txt.py event.ics`
 
+Note: You can limit output to a certain time period. Useful for week logs and the like:
+`./ical2txt.py myexport.ics 20210101 20211231`
+`./ical2txt.py myexport.ics 2021-01-01T00:00:00 2021-01-31T23:59:59`
+
 ## Contributing
 
 1. Fork it!
diff --git a/ical2txt.py b/ical2txt.py
index 71da0d2..f5d7625 100755
--- a/ical2txt.py
+++ b/ical2txt.py
@@ -3,13 +3,21 @@
 import sys
 import os.path
 from icalendar import Calendar
-import csv
+import recurring_ical_events
 from bs4 import BeautifulSoup
 import warnings
 from dateutil.parser import parse
+import datetime
 
 warnings.filterwarnings("ignore", category=UserWarning, module='bs4') # We don't want warnings about URL's. We just what the URL printed, if there.
 
+if len(sys.argv) <= 1:
+    print("Please call this script with an ics-file as parameter.\n")
+    print("Even better, call it with start and end dates:\n")
+    print(sys.argv[0] + " myexport.ics 20210101 20210201")
+    print(sys.argv[0] + " myexport.ics 2021-01-01T00:00:00 2021-01-31T23:59:59\n")
+    exit(1)
+
 filename = sys.argv[1]
 # TODO: use regex to get file extension (chars after last period), in case it's not exactly 3 chars.
 file_extension = str(sys.argv[1])[-3:]
@@ -49,31 +57,33 @@ def removehtml(html):
 
     return text
 
-
 def open_cal():
     if os.path.isfile(filename):
         if file_extension == 'ics':
             print("Extracting events from file:", filename, "\n")
             f = open(sys.argv[1], 'rb')
             gcal = Calendar.from_ical(f.read())
+            revents = recurring_ical_events.of(gcal).between(istart,istop)
 
-            for component in gcal.walk():
+#           for component in gcal.walk():
+            for component in revents:
                 event = CalendarEvent("event")
-                if component.get('TRANSP') == 'TRANSPARENT': continue #skip event that have not been accepted
-                if component.get('SUMMARY') == None: continue #skip blank items
-                event.summary = component.get('SUMMARY')
-                event.uid = component.get('UID')
-                if component.get('DESCRIPTION') == None: continue #skip blank items
-                event.description = component.get('DESCRIPTION')
-                event.location = component.get('LOCATION')
-                if hasattr(component.get('dtstart'), 'dt'):
-                    event.start = component.get('dtstart').dt
-                if hasattr(component.get('dtend'), 'dt'):
-                    event.end = component.get('dtend').dt
+                v=(dir(component).count('get'))
+                if (v != 0):
+                     if component.get('TRANSP') == 'TRANSPARENT': continue #skip all day events and the like
+                     if component.get('SUMMARY') == None: continue #skip blank items
+                     event.summary = component.get('SUMMARY')
+                     event.uid = component.get('UID')
+                     if component.get('DESCRIPTION') == None: continue #skip blank items
+                     event.description = component.get('DESCRIPTION')
+                     event.location = component.get('LOCATION')
+                     if hasattr(component.get('dtstart'), 'dt'):
+                         event.start = component.get('dtstart').dt
+                     if hasattr(component.get('dtend'), 'dt'):
+                         event.end = component.get('dtend').dt
 
-
-                event.url = component.get('URL')
-                events.append(event)
+                     event.url = component.get('URL')
+                     events.append(event)
             f.close()
         else:
             print("You entered ", filename, ". ")
@@ -91,12 +101,6 @@ def txt_write(icsfile):
     spent=0
     evcount=0
     evskip=0
-    istart=0
-    istop=4102441200.0 # The year 2100. Hopefully this will not be in use by then ...
-    if sys.argv[2] != '':
-        istart=parse(sys.argv[2]).timestamp()
-    if sys.argv[3] != '':
-        istop=parse(sys.argv[3]).timestamp()
     print("Processing events :", end=" ")
     try:
         with open(txtfile, 'w') as myfile:
@@ -108,7 +112,7 @@ def txt_write(icsfile):
                         tm=divmod(spent, 3600)[1]/60
                         myfile.write("\nTime Total: " + '{:02.0f}'.format(th) + ":" + '{:02.0f}'.format(tm) + "\n")
                         spent=0
-                if event.start.timestamp() > istart and event.start.timestamp() < istop:
+                if event.start.timestamp() > istart.timestamp() and event.start.timestamp() < istop.timestamp():
                     if prevdate != event.start.strftime("%Y-%m-%d"): # Make a header for each day
                         prevdate = event.start.strftime("%Y-%m-%d")
                         myfile.write("\nWorklog, " + prevdate + "\n===================\n")
@@ -151,6 +155,17 @@ def debug_event(class_name):
     print(class_name.end)
     print(class_name.url, "\n")
 
+istart=datetime.datetime.fromtimestamp(0) # Start of UNIX epoch (1970-01-01T00:00:00)
+istop=datetime.datetime.fromtimestamp(4102441200) # The year 2100. Hopefully this will not be in use by then ...
+
+if len(sys.argv) > 3:
+   if sys.argv[2] != '':
+#      istart=parse(sys.argv[2]).timestamp()
+      istart=parse(sys.argv[2])
+   if sys.argv[3] != '':
+#      istop=parse(sys.argv[3]).timestamp()
+      istop=parse(sys.argv[3])
+
 open_cal()
 sortedevents=sorted(events, key=lambda obj: obj.start)
 txt_write(filename)