It is an offence if we don’t remember or glorify vaiṣṇavas on their appearance or disappearance days. On 19th February was also the disappearance day of Śrīla Jagannātha dāsa Bābājī Mahārāja and Śrīla Rasikānanda-deva.
Because Śrīla Prabhupāda Bhaktisiddhānta Sarasvatī Ṭhākura was very expert in astrology, Śrīla Jagannātha dāsa Bābājī ordered him to produce Navadvīpa Pañjikā, vaisnava calendar, and it should contain the appearance and disappearance dates of vaiṣṇavas. And in this way the vaiṣṇavas can be glorified on their appearance and disappearance days.
Śrīla Jagannātha dāsa Bābājī Mahārāja confirmed the birthplace of Caitanya Mahāprabhu and started jumping and doing kīrtana at that place even though he was very old. Why? Because he could see the pastimes of Caitanya Mahāprabhu. It is said in Caitanya Bhāgavata “Lord Caitanya performs these pastimes even today, and one who is fortunate can constantly see them.”
While Śrīla Bābājī Mahārāja was residing in Vṛndāvana, one of the disciples desired to go to listen to kīrtana performed in Keśī-ghāṭa around mid-night. First he didn’t allow his disciple to go but then said you can go but if they offer prasādam, don’t eat it there but bring it here. The disciple brought the prasādam that evening. The next morning they saw that it contained stool. The next evening the disciple went again for kīrtana and brought back the prasādam. This time it contained nails. Śrīla Bābājī Mahārāja told his disciple to ask the kīrtanīyas who they were.
When the disciple asked the kīrtanīyas who they were. They replied that they are ghosts. In the previous life they were the pūjārīs in the temples in Vṛndāvana. Although they were attached to kīrtana, they misused the money that was offered to Ṭhākurajī for their own enjoyment and because of this offense they took birth as ghosts.
This is an instruction for us that we should be very careful with anything that has been offered to Ṭhākurajī, gurudeva and vaiṣṇavas and not use them for our own sense gratification, otherwise we will definitely have to suffer the reactions.
Also we should be careful whom we associate with and not associate with pseudo devotees even if they may sing very nicely or speak very nice kathā because we will be cheated.
— Śrīla Bhakti Vijñāna Bhāratī Mahārāja