Iranian calendar
and Gregorian calendar have a very important similarity. They work
by circulation of the Sun in solar system. Each person which work by any kind of
them understands what is a certain day of Iranian calendar in other. But leap
year makes problem. A bad problem.
I’ll tell
you the reason.
International
Midwives Day - 5th of May- changes as a very important day in my life. My wife was
graduated as a midwife -like other important date- I have to memory’s it. I knew
5th of May is similar 15th of Ordibehesht in
Iranian calendar. In the year of 1379 (2000) ceremony starts at 16th
of Ordibehesht. I thought hospital managers had mistaken and started International
Midwives Day one day later. I have learnt these date do not change, it means
all time 5th of May is 15th of Ordibehesht. But I find my
knowledge is not complete.
Today in
Iran we need Gregorian calendar more than before. Every application in Mobile, Facebook
which remind us about the calendar work by Gregorian one. Have you ever say
happy birthday wishes in a wrong date. If you want application remind you a
very important date and you do not know about leap year problem, you do your
work in a wrong time.
What is the
leap year problem?
A year has
365 days, 5 hours, 48 minute and some second. In normal calendar we calculate
365 days for a year. After 4 years we add a day in calendar named leap day. This
action is leap up.
Each country
which use sun system calendar know about leap up. Esfand in Iranian calendar is
the last mount and in common years it has 29 days. February in Gregorian calendar
has 28 days in common years. It is 2nd mount of year. Iranian calendar
add leap day on the last day of the year. Esfand changes to 30 days but Gregorian
add that day to February. Leap year makes February to 29 days.
The end of
Esfand is the end of year, new day after Esfand is the day of New Year. New day
of Iranian New year comes 79 days after of Gregorian calendar. It means Gregorian
calendar start leap year 385 days before Iranian. In these days two calendars
has a day different.
My daughter’s
birthday is 19th of Mordad. In common year it is equal 10th
of August but in leap year (385 days I wrote above) it is 9th of
August. Mobile and Facebook and other software make me lazy to memorize
something. I am dependent to my instrument.
Now I know
about leap problem and I wright Iranian date of everything in my calendar. These
385 days I try to control calendar carefully.
A.
Ebrahimy
