**Puzzle:**

On a new year day, two old friends (**A** and **B**) meet at a party. As they met after a long time person **B** wanted person **A** to guess his birthday. As both friends are not in touch for a long time person **A** was unable to guess his birthday. So person **B** decided to give some hints. Below are the hints:

- The day before yesterday I was 25 and next year I will be 28, then person B asked person A to find his birthday.
- The above condition can be true for only one day in the year

__Solution:__

Person B’s birthday is on **December 31**.

__Explanation:__

Person **A** met his old friend on New Year that is on **January 1**. So, the day before yesterday was **December 30** at that time person **B** was **25** year old and at the present Day(January 1) **B is 26 years old**.

This year on December 31 person B will be of age **27** and next year his age will be **28**.

Date |
Age |

December 30 | 25 years old |

December 31 | 26 years old |

January 1 (This year) | 26 years old |

December 31 (This year) | 27 years old |

December 31 (Next year) | 28 years old |

Therefore, Person B’s birthday is on **December 31**.

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