Understanding Panchangam

T: Tithi, N: Nakshatra, Y: Yoga, K: Karana, These times are ending times. When the one finishes the element shown in next day starts right after the previous element finishes. For example Kritika 27:04:05 means Kritika nakshatra will end past midnight at 3hr 4min 5seconds. Another example Rohini 8:59:32. This means Rohini nakshatra ends at 8hr 59min 32seconds AM.
RK: Rahukalam, YM: Yamagandam, GK: Gulika, AJ: Abhijit Muhurtha, DM: Durmuhurtha, V: Varjyam, AK: AmritKalam, AN: Anandadi Yoga, TY: Amritha, Siddha, Marana Yogam as used in tamil panchangam.
The time next to the Sun and the moon is when they enter enter mentioned rashi. For example: Mesha 13:04 means they enter in mesha rashi at 13hr 4min. When the hours mentioned are greater than 24 than they end past midnight. Subtract 24 hours from hours and change the date. Indian Day is from one sunrise to another. These are the standard panchangam notations used by most panchang makers.
Avoid Rahukalam, Yamagandam, Gulika, Durmuhurtha and Varjyam timings. Abhijit and Amrit Kalams are good when they are not intersected by bad muhurthas mentioned above.