My log for the last day of May does not start the 180m signals until 30 minutes after sunset.
With Calipso on 1611, he was a good indicator of when to start seriously listening on MW.
First a few on 48m ....
20:35 6255 24222 Merlin Station_ID Easy_Listening
20:45 6725 44334 Tower Chat_ID Music_Mix
20:50 6220 45444 Tip & Elvis Station_ID Oldies_Music
21:08 1611 44334 Calipso Station_ID Music_Mix
21:12 1620 24232 Ruisbreker Chat_ID
21:21 1636 34233 Kiezer En Kiezeren Tentative_ID Dutch_Music and English Oldies
21:35 1648 44334 Moby Dick Station_ID Schlager_Music and greetings
21:40 1655 32323 Studio 69 Chat_ID Music_Mix Internet Stream re-transmission !
Thanks to all stations
