Question: What month and year did the 30 Month War end?
About the article "Nigeria", section "Civil war (1967-1970)".

Candidate passages:
April 2014 is the fourth month of the current common year.
It began on a Tuesday and will end after 30 days on a Wednesday.
It is the current month. 
There are two special cases involving trades that take place around the end of the month and we are trading in month multiples.
One defines "target month" to lie x months forward from spot if time to expiry is x months; e.g., if in February, and the time to expiry is three months, the target month is May.
If the spot date falls on the last business day of the month in the currency pair then the delivery date is defined by convention to be the last business day of the target month e.g.
assuming all days are business days: if spot is at 30 April, a one month time to expiry will make the delivery date 31 May.
This is described as trading "end-end".
If the spot date falls before the end of the month but the resultant delivery date is beyond the end of the target month then the delivery date is defined by convention to be the last business day of the target month.
For example, assuming all days are business days: if the spot date is 30 January, a one month time to expiry implies delivery date 30 February—however, this doesn’t exist and the delivery date becomes 28 February (in a non-leap year).  
  1866 ("Keiō 2"): "Goryōkaku" completed  September 28, 1866 ("Keiō 2, 20th day of the 8th month"): Shogun Iemochi died at Osaka; and the bakufu petitioned that Hitotsubashi Yoshinobu should be appointed as his successor.
January 10, 1867 ("Keiō 2, 5th day of the 12th month"): Yoshinobu was appointed shogun.
January 30, 1867 ("Keiō 2, 25th day of the 12th month"): Emperor Komei died.
November 10, 1867 ("Keiō 3, 15th day of the 10th month"): An Imperial edict was issued sanctioning the restoration of Imperial government.
January 6, 1868 ("Keiō 3, 10th day of the 12th month"): The restoration of the Imperial government was announced to the "kuge".
The year 1868 began as Keio 3, and did not become Meiji 1 until the 8th day of the 9th month of Keio 4, i.e., October 23; although retrospectively, it was quoted as the first year of the new era from 25 January onwards.
1868 ("Keiō 4, 3rd of the 1st month"): The Boshin War begins with the Battle of Toba-Fushimi.
September 3, 1868 ("Keiō 4, 17th day of the 7th month"): Edo was renamed "Tokyo", i.e.
meaning "Eastern Capital".
October 8, 1868 ("Keiō 4, 23rd of the 8th month"): Battle of Aizu begins.
October 12, 1868 ("Keiō 4, 27th day of the 8th month"): Emperor Meiji is crowned in the Shishin-den in Kyoto.
October 23, 1868 ("Keiō 4/Meiji 1, 8th day of the 9th month"): The nengō is formally changed from Keiō to Meiji; and a general amnesty is granted.
* 1868 ("Meiji 1, 23rd day of the 10th month"): The emperor went to Tokyo; and Edo castle became an Imperial palace.
Keio University, which was initially established in 1858 ("Ansei 5"), seven years before the beginning of the "Keiō" era, is named after this era.
This is the oldest existing institution of higher learning in Japan.  
Nisan (or Nissan) (, Standard "Nisan" Tiberian "Nîsān") on the Assyrian calendar is the first month and on the Hebrew calendar is the first month of the ecclesiastical year and the seventh month (eighth, in leap year) of the civil year.
The name of the month is Babylonian; in the Torah it is called the month of the "Aviv", referring to the month in which barley was ripe.
Assyrians refer to the month as the "month of happiness."
It is a spring month of 30 days.
Nisan usually falls in March–April on the Gregorian calendar.
In the Book of Esther in the Tanakh it is referred to as Nisan. 
Zhou's account is very useful for determining that the 1st month of the Khmer calendar was "kia-to", called Karttika.
None of the Khmer inscriptions uses month numbering, but of the three systems used later in Thailand, Karttika was called month 1 in parts of Lanna and was also sometimes so numbered in Laos.
The astronomical new year, on the other hand, began in what would have been numbered month 6 (Caitra).
This equation is confirmed when Zhou Daguan says he does not understand why they intercalate only in (their) month 9.
On the scale being used here the 9th month is Ashadha, the only intercalary month in Thailand and Laos.
(Ashadha is better known as 'month 8' since that is its Southern (Bangkok) equivalence.
)The use in Cambodia of Ashadha as the only intercalary month is not otherwise securely attested until the 1620s AD when a year (Saka 1539; IMA no.
9) is said to have a 2nd Ashadha when the old system did not have an extra month in that year.
The inscription record between 1296 AD and 1617 AD is very patchy, but such records as survive from the first part of this interval appear to favour the older system of reckoning, suggesting that Zhou Daguan's informants were at the time of his visit in the minority.