Here is a link showing the Islamic calendar on the Roman gregorian calendar
[
link to www.islamicmoon.com]
In America and the global business world it is dominated by the Roman Catholic Gregorian calendar.
Now if you saw someone wanting to change the global business calendar to the Islamic calendar in America then you should look twice at that person.
As for President Obama, he hasn't called for a change to the Islamic calendar so I don't think he is a true Islam person. Nor has he called for a change to the Moon Jew calendar system.
You can see all these things from a Christian Judean New Jerusalem calendar viewpoint.
New Jerusalem with King James Bible
0/0 ---------- ALPHA OMEGA NEW YEAR DAY – VERNAL EQUINOX
MAR 1/14 ----- PASSOVER
MAR 1/15-21 -- FEAST OF UNLEAVENED BREAD
MAR 1/22 ----- EASTER
APR 2/28 ----- MOTHER’S DAY
MAY 3/8 ------ PENTECOST
MAY 3/28 ----- FATHER’S DAY
JUN 4/15-22 -- GOD’S INDEPENDENCE CELEBRATION
SEPT 7/1 ----- FEAST OF TRUMPETS
SEPT 7/10 ---- DAY OF ATONEMENT
SEPT 7/15-21 - FEAST OF TABERNACLES
SEPT 7/22 ---- LAST GREAT DAY
OCT 8/18 ----- HALLOWEEN
NOV 9/4,5 ---- TRUTH DAY THANKSGIVING
DEC 10/1-8 --- FESTIVAL OF LIGHTS CHRISTMAS
JAN 11/32 ---- LOVE DAY
FEB 12/14-15 - FEAST OF PURIM
Mon Mar 1/2/10