Key keywords: Dhu Al Hijjah 1447 AH, Eid Al Adha 2026, Tunisia Islamic calendar announcement, Turkey Religious Affairs Directorate, Hajj 2026 schedule, Muslim holy month, Eid Al Adha prayer dates, Islamic lunar calendar verification. On June 16, 2026, religious authorities in Tunisia and Turkey simultaneously released official statements confirming the first day of Dhu Al Hijjah 1447 AH, the final and one of the most sacred months in the Islamic lunar calendar, falls on June 18, 2026, setting the stage for Eid Al Adha celebrations to begin on June 28, 2026 across both nations. Tunisia’s Ministry of Religious Affairs noted that its national moon sighting committee deployed observers to 17 sites across the country, including coastal and mountainous areas with unobstructed views of the western horizon, and confirmed no crescent moon marking the start of Dhu Al Hijjah was spotted on the evening of June 17, making June 18 the official first day of the month. Turkey’s Directorate of Religious Affairs (Diyanet) echoed the announcement, with its own network of 32 lunar observation stations across Anatolia and Northern Cyprus returning identical findings, marking the third consecutive year the two countries have aligned their Islamic calendar announcements following a 2024 data sharing agreement aimed at eliminating date discrepancies for major religious observances. The announcement carries significant weight for millions of Muslim residents and citizens of both countries, as the first 10 days of Dhu Al Hijjah are considered among the most virtuous periods of the Islamic year, with voluntary acts of worship including fasting, charity, and supplication believed to carry multiplied spiritual reward. For Hajj pilgrims, the confirmed date locks in the 2026 Hajj schedule, with the core pilgrimage rituals set to commence on Dhu Al Hijjah 8 (June 25, 2026) in Mecca, Saudi Arabia. Tunisia has been allocated 12,000 Hajj slots for 2026, all of which were filled within 72 hours of registration opening earlier this year, while Turkey’s 45,000 slots were claimed in less than two days. Both countries’ Hajj mission authorities noted that the confirmed Dhu Al Hijjah date allows them to finalize travel itineraries for pilgrims, with the first groups set to depart for Saudi Arabia on June 20. The aligned announcement also simplifies celebration plans for cross-border families, a demographic of more than 250,000 people between the two nations. Religious authorities in both countries also released additional guidance alongside the date announcement, noting that Eid Al Adha prayers will be held in all registered mosques on the morning of June 28, with guidance provided for sacrificial animal slaughter to ensure compliance with Islamic law, including requirements that one-third of the meat be reserved for low-income and vulnerable communities. Travel industry data from both nations shows that within 24 hours of the announcement, domestic holiday bookings for the 4-day Eid Al Adha public holiday rose 72% year-over-year, while cross-border flight bookings between Tunisia and Turkey jumped 58% as families plan joint celebrations.