diff --git a/README.md b/README.md
index 41a6ee8..5f1e8ff 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Managing LaTeX lecture notes
 
 This repository complements my [third blog post about my note taking setup](https://castel.dev/post/lecture-notes-3).
+
 ## A quick overview:
 
 ### File structure
diff --git a/preamble.tex b/preamble.tex
index 7a24445..33fc8fc 100644
--- a/preamble.tex
+++ b/preamble.tex
@@ -9,6 +9,8 @@
 \usepackage{booktabs}
 \usepackage{enumitem}
 
+\pdfminorversion=7
+
 % Don't indent paragraphs, leave some space between them
 \usepackage{parskip}
 
@@ -247,7 +249,6 @@
 % Figure support as explained in my blog post.
 \usepackage{import}
 \usepackage{xifthen}
-\pdfminorversion=7
 \usepackage{pdfpages}
 \usepackage{transparent}
 \newcommand{\incfig}[1]{%
diff --git a/scripts/config.py b/scripts/config.py
index aadc344..3db98e0 100644
--- a/scripts/config.py
+++ b/scripts/config.py
@@ -4,6 +4,13 @@ from pathlib import Path
 def get_week(d=datetime.today()):
     return (int(d.strftime("%W")) + 52 - 5) % 52
 
+# default is 'primary', if you are using a separate calendar for your course schedule,
+# your calendarId (which you can find by going to your Google Calendar settings, selecting
+# the relevant calendar and scrolling down to Calendar ID) probably looks like
+# xxxxxxxxxxxxxxxxxxxxxxxxxg@group.calendar.google.com
+# example:
+# USERCALENDARID = 'xxxxxxxxxxxxxxxxxxxxxxxxxg@group.calendar.google.com'
+USERCALENDARID = 'primary'
 CURRENT_COURSE_SYMLINK = Path('~/current_course').expanduser()
 CURRENT_COURSE_ROOT = CURRENT_COURSE_SYMLINK.resolve()
 CURRENT_COURSE_WATCH_FILE = Path('/tmp/current_course').resolve()
diff --git a/scripts/countdown.py b/scripts/countdown.py
index 5a604c3..dfc26df 100755
--- a/scripts/countdown.py
+++ b/scripts/countdown.py
@@ -21,6 +21,7 @@ from google_auth_oauthlib.flow import InstalledAppFlow
 from google.auth.transport.requests import Request
 
 from courses import Courses
+from config import USERCALENDARID
 
 courses = Courses()
 
@@ -58,7 +59,7 @@ def join(*args):
 def truncate(string, length):
     ellipsis = ' ...'
     if len(string) < length:
-        return string 
+        return string
     return string[:length - len(ellipsis)] + ellipsis
 
 def summary(text):
@@ -186,7 +187,7 @@ def main():
             if 'dateTime' in event['start']
         ]
 
-    events = get_events('primary')
+    events = get_events(userCalendarId)
     # events = get_events('primary') + get_events('school-calendar@import.calendar.google.com')
     print('Done')
 
@@ -197,7 +198,7 @@ def main():
         print(text(events, now))
         if now < evening:
             scheduler.enter(DELAY, 1, print_message)
-    
+
     for event in events:
         # absolute entry, priority 1
         scheduler.enterabs(event['start'].timestamp(), 1, activate_course, argument=(event, ))
@@ -205,7 +206,7 @@ def main():
     # Immediate, priority 1
     scheduler.enter(0, 1, print_message)
     scheduler.run()
-    
+
 
 def wait_for_internet_connection(url, timeout=1):
     while True: