Hours which are past midnight are suffixed with next day date. In Panchang day starts and ends with sunrise.
Meena Sankranti marks the beginning of the twelfth and last month in Hindu Solar Calendar. All twelve Sankrantis in the year are highly auspicious for Dan-Punya activities. Only certain time duration before or after each Sankranti moment is considered auspicious for Sankranti related activities.
For Meena Sankranti sixteen Ghatis after the Sankranti moment are considered Shubh or auspicious and the time window from Sankranti to sixteen Ghati after Sankranti is taken for all Dan-Punya activities.
During Meena Sankranti donating land is considered highly auspicious. In South India Sankranti is called as Sankramanam. Meena Sankranti is also spelled as Mina Sankranti.