On Imam Hasan AS shahadat raat, 28th raat Safar ul-Muzaffar (Saturday 26 October), Maghrib/Isha Imamat Namaaz will be held at markaz followed by Majlis and Niyaz Jaman.
For those who are unable to participate at markaz, amal details are available including qasida mubaraka Aba Mohammadal Hasan composed by Syedna Taher Saifuddin RA with English translation, and a marsiya written in Dawat Zabaan Ay Hasan Ay Nabi na Piyaara is also available with audio recording.
Alternatively, mumineen may watch the recording of majlis from Darus Sakina, 1438H:
https://www.youtube.com/watch?v=RGycWnVNu_I