Student : Good morning, Sir.
Teacher : Good morning. How are you?
Student : I am fine. Thank you, sir. How are you?
Teacher : I am also fine. Thank you.
Student : Sir, would you please tell me how to use a calendar?
Teacher : Of course. Look at the calendar. What do you see?
Student : Names of months and days.
Teacher : Nothing else?
Student : There are dates also. Some are black colour and some are red colour.
Teacher : You have almost learnt. The dates and days tell you what date is in which day.
Student : Colour of dates?
Teacher : The red colours are holy days and the black colours are working days.
Student : Thank you, sir.
Teacher : No mention.