Hi @madbaets.
I’m happy you got it to work! 
Unfortunately, there’s currently no “date range widget,” but please feel free to submit a feature request. The more detail you can provide the better!
In the meantime, may I please suggest this workaround:
import streamlit as st
import datetime
today = datetime.date.today()
tomorrow = today + datetime.timedelta(days=1)
start_date = st.date_input('Start date', today)
end_date = st.date_input('End date', tomorrow)
if start_date < end_date:
st.success('Start date: `%s`\n\nEnd date:`%s`' % (start_date, end_date))
else:
st.error('Error: End date must fall after start date.')
