The Hebrew Calendar is Lunar based.  The New Moon notes the first day of the month.
HEBREW CALENDAR GREGORIAN CALENDAR
RED INDICATES DATES OF NOTE BLUE INDICATES NEW MOON
TISHRI - 5771 SEPT/OCT - 2010
S M T W T F S S M T W T F S
1 2 3 8 9 10 11
4 5 6 7 8 9 10 12 13 14 15 16 17 18
11 12 13 14 15 16 17 19 20 21 22 23 24 25
18 19 20 21 22 23 24 26 27 28 29 30 OCT 1 2
25 26 27 28 29 30 3 4 5 6 7 8
HESHVAN - 5771 OCT/NOV - 2010
S M T W T F S S M T W T F S
1 9
2 3 4 5 6 7 8 10 11 12 13 14 15 16
9 10 11 12 13 14 15 17 18 19 20 21 22 23
16 17 18 19 20 21 22 24 25 26 27 28 29 30
23 24 25 26 27 28 29 31 NOV 1 2 3 4 5 6
30 7
KISLEV - 5771 NOV/DEC - 2010
S M T W T F S S M T W T F S
1 2 3 4 5 6 8 9 10 11 12 13
7 8 9 10 11 12 13 14 15 16 17 18 19 20
14 15 16 17 18 19 20 21 22 23 24 25 26 27
21 22 23 24 25 26 27 28 29 30 DEC 1 2 3 4
28 29 30 5 6 7
TEVETH - 5771 DEC/JAN - 2011
S M T W T F S S M T W T F S
1 2 3 4 8 9 10 11
5 6 7 8 9 10 11 12 13 14 15 16 17 18
12 13 14 15 16 17 18 19 20 21 22 23 24 25
19 20 21 22 23 24 25 26 27 28 29 30 31 JAN 1
26 27 28 29 2 3 4 5
SHEBAT - 5771 JAN/FEB - 2011
S M T W T F S S M T W T F S
1 2 3 6 7 8
4 5 6 7 8 9 10 9 10 11 12 13 14 15
11 12 13 14 15 16 17 16 17 18 19 20 21 22
18 19 20 21 22 23 24 23 24 25 26 27 28 29
25 26 27 28 29 30 30 31 FEB 1 2 3 4
ADAR 1 - 5771 FEB/MAR - 2011
S M T W T F S S M T W T F S
1 5
2 3 4 5 6 7 8 6 7 8 9 10 11 12
9 10 11 12 13 14 15 13 14 15 16 17 18 19
16 17 18 19 20 21 22 20 21 22 23 24 25 26
23 24 25 26 27 28 29 27 28 MAR 1 2 3 4 5
30 6
ADAR 2 - 5771 MAR/APR - 2011
S M T W T F S S M T W T F S
1 2 3 4 5 6 7 8 9 10 11 12
7 8 9 10 11 12 13 13 14 15 16 17 18 19
14 15 16 17 18 19 20 20 21 22 23 24 25 26
21 22 23 24 25 26 27 27 28 29 30 31 APR 1 2
28 29 3 4
NISSAN - 5771 APR/MAY - 2011
S M T W T F S S M T W T F S
1 2 3 4 5 5 6 7 8 9
6 7 8 9 10 11 12 10 11 12 13 14 15 16
13 14 15 16 17 18 19 17 18 19 20 21 22 23
20 21 22 23 24 25 26 24 25 26 27 28 29 30
27 28 29 30 MAY 1 2 3 4
IYAR - 5771 MAY/JUNE - 2011
S M T W T F S S M T W T F S
1 2 3 5 6 7
4 5 6 7 8 9 10 8 9 10 11 12 13 14
11 12 13 14 15 16 17 15 16 17 18 19 20 21
18 19 20 21 22 23 24 22 23 24 25 26 27 28
25 26 27 28 29 29 30 31 JUNE 1 2
SIVAN - 5771 JUNE/JULY - 2011
S M T W T F S S M T W T F S
1 2 3 4
3 4 5 6 7 8 9 5 6 7 8 9 10 11
10 11 12 13 14 15 16 12 13 14 15 16 17 18
17 18 19 20 21 22 23 19 20 21 22 23 24 25
24 25 26 27 28 29 30 26 27 28 29 30 JULY 1 2
TAMMUZ - 5771 JULY - 2011
S M T W T F S S M T W T F S
1 2 3 4 5 6 7 3 4 5 6 7 8 9
8 9 10 11 12 13 14 10 11 12 13 14 15 16
15 16 17 18 19 20 21 17 18 19 20 21 22 23
22 23 24 25 26 27 28 24 25 26 27 28 29 30
29 31
AV - 5771 AUGUST - 2011
S M T W T F S S M T W T F S
1 2 3 4 5 6 AUG 1 2 3 4 5 6
7 8 9 10 11 12 13 7 8 9 10 11 12 13
14 15 16 17 18 19 20 14 15 16 17 18 19 20
21 22 23 24 25 26 27 21 22 23 24 25 26 27
28 29 30 28 29 30
ELUL - 5771 AUG/SEPT - 2011
S M T W T F S S M T W T F S
1 2 3 4 31 SEPT 1 2 3
5 6 7 8 9 10 11 4 5 6 7 8 9 10
12 13 14 15 16 17 18 11 12 13 14 15 16 17
19 20 21 22 23 24 25 18 19 20 21 22 23 24
26 27 28 29 25 26 27 28
Tishri 1 Rosh HaShanah - Beginning of Secular Year (Leviticus 23:23)
Tishri 10 Yom Kippur - Day of Atonement (Leviticus 23:26)
Tishri 15 Sukkot - Feast of Booths, Feast of Harvest (Leviticus 23:33)
Kislev 25 Chanukah - Festival of Lights (see History of Maccabean Revolt)
Adar 14 & 15 Purim - see Book of Esther
Nisan 10 Passover Lamb chosen (Exodus 12:3)
Nisan 14 Passover begins at Sundown (Leviticus 23:5)
Nisan 15 The Feast of Unleavened Bread (Leviticus 23:6)
The first Sunday after Passover begins the fifty day count
for Pentecost  (Leviticus 23:11)
Sivan 10 Shavuot - Pentecost (Leviticus 23:16)
Tammuz 17 Anniversary of destruction of the walls of Jerusalem (twice)
Av 9 Anniversary of destruction of the Temple (twice)