Depending on which Hebrew year you are looking at (civil or ecclesiastical), it is either Elul (×לול) or Adar (×דר)
Adar.
In the Hebrew calendar, the month of Av is followed by the month of Elul.
The Hebrew month Adar is the same in all countries. It is a Spring month.
Adar is the sixth month of the Hebrew calendar and the twelfth month of the civil calendar used in ancient Persia. It typically falls in February or March on the Gregorian calendar, and it is the month that contains the holiday of Purim.
In the Hebrew calendar, the month of Nissan immediately precedes Iyar.
April is not a month in the Hebrew calendar, and the Sundays in any Hebrew month could easily change from year to year, just as they often do for any month in the civil calendar.
The tenth month in the Hebrew calendar is called "Tamuz". It usaually falls out around July time.
This may be somewhat confusing, but here it is: Printed Jewish calendars, or books that outline the order of prayers through the year, will begin with the month of 'Tishrei' ... the month in which Rosh Hashana, "Head of the Year", occurs ... usually corresponding to sometime in September. The next month ... second in the printed calendar ... is 'Cheshvan'. But the Torah refers to those months as the seventh and eighth months respectively. As far as the Torah is concerned, the first month is the month of 'Nissan' ... the month in which Passover occurs ... corresponding to some time in March or April. On that basis, the second month is 'Iyar'.
The present calendar, used world wide for business, is the Gregorian calendar.
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There are 12 months in the Hebrew calendar. In a leap year there are Adar A and Adar B. Adar is the sixth month.
Cheshvan