Question: Jeju Air is a founding member of the alliance formed in which month?

Context paragraphs:
Labour, Democracy and Freedom Bloc: The Labour, Democracy and Freedom Bloc (Turkish: "Emek, Demokrasi ve Özgürlük Bloğu") was an electoral alliance formed by the pro-Kurdish Peace and Democracy Party (BDP) with several other smaller left-wing parties and political movements in Turkey.  The alliance contested the 2011 general election by fielding candidates from participating parties as independents in order to bypass the 10% election threshold needed to win seats in the Turkish Grand National Assembly.  The alliance won 5.67% of the vote, initially winning 36 MPs.  The Supreme Electoral Council of Turkey later annulled the election of BDP MP Hatip Dicle in Diyarbakır, reducing the alliance's elected MPs to 35.  The Bloc fielded 65 candidates in 41 provinces.

Jeju Air destinations: The following is a list of destinations served by Jeju Air as of November 2015.

Vanilla Alliance: The Vanilla Alliance (French: "Alliance Vanille" ) is an airline alliance formed in September 2015 to improve air connectivity within the Indian Ocean region by strengthening cooperation between the airlines of Indian Ocean Commission members.  Ultimately, the alliance wishes to increase tourism, trade, and business ties in the region.  The founding members are Air Austral, Air Madagascar, Air Mauritius, Air Seychelles and Int'Air Îles.

Islamic Unity of Afghanistan Mujahideen: The Islamic Unity of Afghanistan Mujahideen, also known as the Seven Party Mujahideen Alliance or Peshawar Seven, was an Afghan alliance formed in either 1981 or 1985 (see Alliance Formation below) by the seven Afghan mujahideen parties fighting against the Soviet-backed Democratic Republic of Afghanistan forces in the Soviet-Afghan War.  The alliance sought to function as a united diplomatic front towards the world opinion, and sought representation in the United Nations and Organisation of the Islamic Conference.

People's Welfare Front: People's Welfare Front (PWF) is a Tamil-Nadu political alliance formed in October 2015.  It consists of four political parties: Communist Party of India (CPI), Communist Party of India (Marxist) (CPI(M)), Viduthalai Chiruthaigal Katchi (VCK), and Marumalarchi Dravida Munnetra Kazhagam (MDMK).  The alliance was expected to contest the 2016 Tamil Nadu and Poducherry legislative assembly elections as one unit.  The alliance has rejected potential alliance with Indian National Congress, BJP, DMK or ADMK, while hopeful of enlisting and TMC (G.K.Vasan) and Puthiya Thamizhakam.

Balkan League: The Balkan League was an alliance formed by a series of bilateral treaties concluded in 1912 between the Balkan states of Greece, Bulgaria, Serbia and Montenegro, and directed against the Ottoman Empire, which at the time still controlled much of the Balkan peninsula.  The Balkans had been in a state of turmoil since the early 1900s, with years of guerrilla warfare in Macedonia followed by the Young Turk Revolution and the protracted Bosnian Crisis.  The outbreak of the Italo-Turkish War in 1911 had further weakened the Ottomans and emboldened the Balkan states.  Under Russian influence, Serbia and Bulgaria settled their differences and signed an alliance, originally directed against Austria-Hungary on 13 March 1912, but by adding a secret chapter to it essentially redirected the alliance against the Ottoman Empire.  Serbia then signed a mutual alliance with Montenegro, while Bulgaria did the same with Greece.  The League was victorious in the First Balkan War which broke out in October 1912, where it successfully wrestled control of almost all European Ottoman territories.  Following this victory however, unresolved prior differences between the allies re-emerged over the division of the spoils, particularly Macedonia, leading to the effective break-up of the League, and soon after, on 16 June 1913, Bulgaria attacked her erstwhile allies, beginning the Second Balkan War.

Jeju Air: Jeju Air (), based in Jeju City, Jeju-do, South Korea, is a South Korean low-cost carrier, the first to be founded in the country.  It offers scheduled domestic services between several cities in South Korea and Seoul as well as some destinations outside of Korea.  It is also a founding member of the Value Alliance.

Islami Jamhoori Ittehad: The Islami Jamhoori Ittehad (or "IJI") English lit.  Islamic Democratic Alliance, Acronym:(IDA, IJI) (Urdu: ‎ ) was a right-wing conservative alliance formed in September 1988 to oppose the democratic socialist Pakistan Peoples Party in elections that year.  The alliance comprised nine parties, of which the major components were the Pakistan Muslim League (PML), National Peoples Party (NPP), Jamaat-e-Islami (JI), with PML accounting for 80% of the IJI's electoral candidates.  The Inter-Services Intelligence (ISI) agency, under director Hamid Gul, had a major role in forming the center-of-right political alliance.  Care had been taken to ensure that the alliance comprised nine parties to generate comparison with the nine-party Pakistan National Alliance (PNA) that had campaigned against Zulfikar Ali Bhutto in 1977.

Value Alliance: Value Alliance is an airline alliance formed in May 2016.  It is the world's second alliance (after the U-FLY Alliance) to consist only of low-cost carriers (LCCs).  However, it is the first pan-regional LCC alliance.  It comprises seven Asia-Pacific airlines: Cebu Pacific, Jeju Air, Nok Air, NokScoot, Scoot, Tigerair Australia and Vanilla Air, along with Tigerair who merged with Scoot under the Scoot brand.

Franco-Russian Alliance: The Franco-Russian Alliance, or Russo-French Rapprochement, was an alliance formed by the agreements of 1891–93; it lasted until 1917.  The strengthening of the German Empire, the creation of the Triple Alliance of 1882, and the exacerbation of Franco-German and Russo-German contradictions at the end of the 1880s led to a common foreign policy and mutual strategic military interests between France and Russia.  The development of financial ties between the two countries created the economic prerequisites for the Russo-French Alliance.

Supporting paragraphs: Jeju Air Value Alliance
Answer: May 2016