Explanation

A solar year is approximately 365.25 days, which accounts for Earth's full orbit around the sun.

The extra ¼ day each year is why we have a leap year every 4 years.

The solar year 365 days 5 hours 48 minutes 46 seconds, also called tropical year, or year of the seasons.

Explanation

A lunar year (based on 12 lunar months) is approximately 354 days, while a solar year is about 365 days.

Therefore, the lunar year is shorter by about 11 days than the solar year.

Explanation

Explanation

World Health Day is observed on 7th April every year.

Theme 2025: Healthier beginnings, hopeful futures

Additional Information: 

World Health Organization (WHO) was founded on 7 April 1948.

WHO has its headquarters in Geneva, Switzerland. 

Explanation

"Equinox"  means Equal duration of day and night.

The time or date (twice each year) at which the sun crosses the celestial equator  when day and night are of approximately equal length.

During the equinoxes, solar declination is 0°

the September equinox is called the autumnal or fall equinox on 23 September

the March equinox is called the vernal or spring equinox on 19 March or as late as 21 March

ND-8-08-2023

Explanation

World Braille Day is an international day on 4 January 

The first World Braille Day was celebrated on January 4, 2019

The 5th edition of World Braille Day was celebrated on 4 January, 2023.

The day recognizes the contributions of Louis Braille in helping blind and visually impaired people to read and write.

Explanation

Explanation

A leap year occurs every 4 years if the year is divisible by 4.

However, years divisible by 100 are not leap years unless they are also divisible by 400.

• 1896: Divisible by 4 → Leap year
• 1902: Not divisible by 4 → Not a leap year
• 1904: Divisible by 4 → Leap year
• 1908: Divisible by 4 → Leap year

Explanation

AIDS is a pandemic disease caused by the infection of (HIV), which damages the human immune system.

World AIDS Day is observed on 1 December since 1988.

Theme 2021: End Inequalities, End AIDS

Theme 2022: Equalize

Explanation

The year 2024 is a 'leap year'.

Its meaning the month of February will have 29 days instead of 28.

Total number of days will be 366 instead of 365.

This was also the case in 2024, and 2028 will again be a leap year.