The biblical calendar

Nowadays, the Jewish year begins with the feast of Rosh Hashanah (Feast of trumpets, ראש השנה), which usually somewhere in September. This is not, however, the beginning of the Hebrew year as ordained by God.1
In biblical times, the year began with the month of Nisan2 (נִיסָן‎), called Aviv in the Torah (5 books of Moses: Lev. 23:5; Num. 9:1-5, 28:16). The name Nisan is of Babylonian origin. Nisan usually falls in March–April on the Gregorian calendar.

This month shall be for you the beginning of months. It shall be the first month of the year for you.
Exodus 12:2

It is during this first month that the Passover (Pesach, פֶּסַח) is celebrated.

Overview over the year

In some years, Rosh Hashanah is postponed. In that case, Kislev can be shortened to 29 days, and the year is called a short (chaser) year, or Marcheshvan can be lengthened to 30 days, and the year is called a full (maleh) year. In a regular (kesidran) year, Marcheshvan has 29 days and Kislev has 30 days though.

The calendar rules have been designed to ensure that Rosh Hashanah does not fall on a Sunday, Wednesday or Friday. This is to ensure that Yom Kippur does not directly precede or follow Shabbat, which would create practical difficulties, and that Hoshana Rabbah is not on a Shabbat, in which case certain ceremonies would be lost for a year.
The solar year is about eleven days longer than twelve lunar months. The Bible does not directly mention the addition of “embolismic” or intercalary months. However, without the insertion of embolismic months, Jewish festivals would gradually shift outside of the seasons required by the Torah. This has been ruled as implying a requirement for the insertion of embolismic months to reconcile the lunar cycles to the seasons, which are integral to solar yearly cycles.3

The following table gives an overview over the Hebrew calendar:

# Hebrew Common Length Babylonian analog Holidays Notes
1 נִיסָן Nissan 30 days Nisanu Passover Called Abib (Ex. 13:4, 23:15, 34:18; Deut. 16:1) and Nisan (Est. 3:7)
2 אִיָּר / אייר Iyar 29 days Ayaru Pesach Sheni, Lag B’Omer Called Ziv in 1 Kings 6:1, 6:37
3 סִיוָן / סיוון Siwan 30 days Simanu Shavuot
4 תַּמּוּז Tamuz 29 days Dumuzu 17th of Tammuz Named for the Babylonian god Dumuzi/Tammuz
5 אָב Ab 30 days Abu Tisha B’Av, Tu B’Av
6 אֱלוּל Elul 29 days Ululu
7 תִּשׁרִי Tishrei 30 days Tashritu Rosh Hashanah, Yom Kippur, Sukkot, Shmini Atzeret, Simchat Torah Called Ethanim in 1 Kings 8:2, 1st month of civil year.
8 מַרְחֶשְׁוָן / מרחשוון Marcheshvan, Cheshvan 29 or 30 days Arakhsamna Called Bul in 1 Kings 6:38
9 כִּסְלֵו / כסליו Kislev, Chisleu, Chislev 29 or 30 days Kislimu Hanukkah
10 טֵבֵת Tebeth 29 days Tebetu 10th of Tevet
11 שְׁבָט Shevat, Shebat, Sebat 30 days Shabatu Tu Bishvat
12L* אֲדָר א׳ Adar I* 30 days *Only in Leap years.
12 אֲדָר / אֲדָר ב׳ Adar, Adar II 29 days Adaru Purim

References

1 Article in the Jewish Encyclopedia
2 Article in the Jewish Encyclopedia
3 Article on Wikipedia

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The names of Messiah

According to Raphael Patai, there are several names used for the Messiah (Mashiach, מָשִׁיחַ‎) throughout the bible and ancient rabbinic writings. Note that the author of of this work was an orthodox Jew. The following table is a compilation of the information he wrote down1:

Name Hebrew Meaning Source
Avi’Ad Shalom Eternal Father of Peace S. Buber’s note, ibid. p.87
(Anointed to) David דָּוִיד Historical allusion Y. Ber. 5a; B. Sanh. 98b (Based on Jer. 30.9, Ez. 37.25); Lam. Rab. 1.51, p.36, ad Lam. 1:16 (Based on Ps. 18:50)
E.g. Shoot, Light, Staff (for the righteous) Symbolic terms 1st Book of Enoch 48:4-6; Y. Ber. 5a; Lam. Rab. 1.51, p.36, ad Lam. 1:16
El אל God S. Buber’s note, ibid. p.87
Fragrance Symbolic term Zohar Hadash, Mid. haNe’elam to Songs, p.64c (Based on Isa. 11.3)
Hadrakh Sharp and Soft Sifre Deut. ed. Friedmann 65a (Based on Zech. 9.1)
Hanina חנינא Favour Lam. Rab. 1.51, p.36, ad Lam. 1:16 (Based on Jer. 16.3)
Head of Days Allusion to his preexistence 1st Book of Enoch 46:1-3, 48:4-6
Menahem מְנַחֵם Comforter B. Sanh. 98b; Y. Ber. 5a
Nehira נהירה Light Lam. Rab. 1.51, p.36, ad Lam. 1:16 (Based on Dan. 2:22)
Peace  שָׁלוֹם Symbolic terms Pereq Shalom p.101 (Based on Isa. 9:5, 52:7)
Pele פֶּלֶא Miracle S. Buber’s note, ibid. p.87
Shiloh שילה Mid. Mishle, ed. Buber p.87 (Based on Gen. 49:10)
Son of Man בן–אדם Special nearness to God Ezekiel; 1st Book of Enoch 46:1-3, 62:7-9
The Holy One (blessed be he) הקדוש ברוך הוא B. Meg. 13b; B. Bab. Bath. 95b
The Leprous (of the House of Study) B. Sanh. 98b (Based on Isa. 53.4); Hassidic legend on the Leper Messiah
The Name of God השם Rabbinic literature
The Name of the Messiah B. Pes. 54a, B. Ned. 39a (Based on Ps. 72.17); Gen. Rab. 1:4
The Spirit of God רוח אלהים The Spirit of Messiah Gen. Rab. 2:4 (Based on Gen. 1.2 & Isa. 11.2)
Tzidqenu, Tsadik צדקנו, צדיק Our Justice, Righteous One Mid. Mishle, ed. Buber p.87; Jer. 23.6
Yinnon יִנּוֹן to be continued, to endure forever Lam. Rab. 1.51, p.36, ad Lam. 1:16 (Based on Ps. 72:17)
Yo’etz יו-עץ Counselor S. Buber’s note, ibid. p.87

The above it obiously an this incomplete list, though thoroughly researched, as many more symbolic terms and names can be found referring to Messiah. Nevertheless, I would like to add these two names:

Name Hebrew Meaning Source
Yeshua ישוע Salvation, short form of Yehoshua My own interpretation based on Lam. Rab. 1.51, p.36, ad Lam. 1:16 (Based on Ps. 18:50)
Yehoshua יהושוע The LORD is Salvation Hand-written note by Rabbi Yitzchak Kaduri uncovering the name of the Messiah2

References

1 Raphael Patai, The Messiah Texts, Wayne State University Texts, Detroit 1979, p. 17-22. Link on Google Books
2 Acronym of a note saying: “He will raise the people and confirm that his word and law are standing” (ירים העם ויוכיח שדברו ותורתו עומדים), from Nrg.co.il and News1.co.il (retrieved 2012-11-26)