The year 1400 is the fourteenth year of the solar Hijri calendar. It was the time of Iran. This is a normal year.
This year is named in Chinese astrology as the Year of the Cow.
According to custom, some people consider the 1st of Farvardin of the year 1400 AH to be the beginning of the 15th century AH. It started on Wednesday, April 1, 1301, and will end on Sunday, March 20, 1961; Therefore, the first day of the fifteenth century AH will be Monday, April 1, 1401. This argument is true when you start the century with one. But if the beginning of the century is considered "zero" in astronomical-mathematical terms, or in more philosophical terms, you do not take constructive precedence over any positive existence, the solution of 1400 is the beginning of the fifteenth century. Zero is the difference between a set of natural numbers and a set of numbers. It is considered arithmetic and is considered as one of the greatest achievements of Eastern mathematicians in the Middle Ages (the spread of the decimal system by Kharazmi). All those who knew about the history of computers (Y2K) knew the beginning of the 21st century, and in contrast to many scholars of the Christian calendar, 2001 declared the beginning of the 21st century.
This year is in the animal calendar of the year of the cow.
"Cultural year of Iran and Turkey"
The United Nations has declared 2021 as the International Year of Peace and Trust, the International Year of Creative Economics for Sustainable Development, the International Year of Fruits and Vegetables, and the International Year for the Elimination of Child Labor.
This year in Iran was named "Production, Support, Obstacles" by Seyyed Ali Khamenei.
April 1 - A three-day hunger strike by political prisoners
April 25 - Protest rally in Gonbad Kavous
April 25 - The Suez Canal closes
April 27 - Iran and China sign a 25-year joint cooperation agreement
April 6 - Two environmentalists are killed in Zanjan
April 12 - Sabotage at the Natanz nuclear facility
April 16 - Two border guards of the Saravan Border Regiment were killed
April 20 - Genaveh Port Earthquake