On Wednesday May 4, 2011 the new moon was "not"sighted from Israel, because of cloud cover. Since Yah's month cannot be longer than 30 days, that means that by "default" the month starts tonight the evening of May 4th Wednesday for all Countries West of Jerusalem up to the International Date Line, and the evening of Thursday May 5th for all Countries West of man's false International Date Line.
Again: The Biblical first Crescent of the moon was "not" sighted on Wednesday evening May 4th,
"yet" the Kiddish must be on Wednesday evening May 4th 2011 for all Countries "West" of Jerusalem, (including all of the USA)"up to" man's false Date Line:

after
Sundown Wednesday evening May
4th in "your" particular City, (for all Cities
"West" of Jerusalem up to man's wrong/false International Date Line).
But the Kiddish is on Thursday Evening May 5th for all Cities "West" of man's wrong/false International Date Line westward till the shadow of the sun reaches the Euphrates river (which is Yah's/God's boundary line for Israel).
Have a thankful (in gratitude), Kiddish celebration Tonight, in remembrance of the sacrifice of Yeshua.
How to do the Kiddish, click here> http://1stcenturychristian.com/How_Kiddish.html
Remember to end your Kiddish with a song, click here> http://1stcenturychristian.com/Sheep.html
1.) Must wait until the "next" night = must wait until Thursday night May 5th (after Sundown) to start Yah's/God's Kiddish.
Yahweh's Date Line "is" at the Euphrates (which was Yah's (original) eastern border for Israel Genesis 15:18 Joshua 1:4.)
Therefore the Kiddish is "Tuesday" night in Australia all the way West to Pakistan to Yah's Date Line at the Euphrates.
2.) Again: "West" of the false International Date Line, Friday May 6th Daylight portion is day 1 of Iyar because West of the Date Line you have to wait until Thursday evening May 5th to start Yah's month.
In summation:
"Daytime" Friday May 6th is day 1 of Iyar for all Nations "West" of man's false International Date Line.
Therefore day 1 of Iyar starts on the evening of Thursday May 5 (Thursday evening) "West" of man's false International Date Line,
but Wednesday evening May 4th for all Countries East of man's false Date Line.