Tehran

Tehran ( pronunciation ; Persian: Tehrān – تهران‎‎) is the capital of Iran and Tehran Province. With a population of around 9 million in the city and 16 million in the wider metropolitan area, Tehran is the largest city and urban area of Iran, the second largest city in Western Asia, and the 3rd largest in the Middle East. It is ranked 29th in the world by the population of its metropolitan area.

In the Classical era, part of the present-day city of Tehran was occupied by a Median city, which in the Avesta occurs as Rhaga. It was destroyed by the Mongols in the early 13th century, and remains now as a city in Tehran Province, located towards the southern end of the modern-day city of Tehran.

Tehran was first chosen as the capital of Iran by Agha Mohammad Khan of the Qajar dynasty in 1796, in order to remain within close reach of Iran's territories in the Caucasus, at that time still part of Iran, and to avoid the vying factions of previous Iranian dynasties. The capital has been moved several times throughout the history, and Tehran is the 32nd national capital of Iran.

Iran

Iran (/aɪˈræn/ or ⁱ/ɪˈrɑːn/;Persian: Irān – ایران‎‎ [ʔiːˈɾɒːn]), also known as Persia (/ˈpɜːrʒə/ or /ˈpɜːrʃə/), officially the Islamic Republic of Iran (جمهوری اسلامی ایران – Jomhuri ye Eslāmi ye Irān [d͡ʒomhuːˌɾije eslɒːˌmije ʔiːˈɾɒːn]), is a country in Western Asia. It is bordered to the northwest by Armenia, the de facto Nagorno-Karabakh, and Azerbaijan; with Kazakhstan and Russia across the Caspian Sea; to the northeast by Turkmenistan; to the east by Afghanistan and Pakistan; to the south by the Persian Gulf and the Gulf of Oman; and to the west by Turkey and Iraq. Comprising a land area of 1,648,195 km² (636,372 sq mi), it is the second-largest country in the Middle East and the 18th-largest in the world. With 78.4 million inhabitants, Iran is the world's 17th-most-populous country. It is the only country that has both a Caspian Sea and an Indian Ocean coastline. Iran has long been of geostrategic importance because of its central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz.

Iranian calendars

The Iranian calendars (Persian: گاه‌شماری ایرانی‎‎ Gâhshomâriye Irâni) are a succession of calendars invented or used for over two millennia in Iran (Persia). One of the longest chronological records in human history, the Iranian calendar has been modified time and again during its history to suit administrative, climatic, and religious purposes.

The modern Iranian calendar is now the official calendar in Iran. It begins at the midnight nearest to the instant of the vernal equinox as determined by astronomical calculations for the Iran Standard Time meridian (52.5°E or GMT+3.5h). It is, therefore, an observation-based calendar, unlike the Gregorian, which is rule-based.

The Iranian year usually begins within a day of 21 March of the Gregorian calendar. To find the corresponding year of the Gregorian calendar, add 621 or 622 (depending on the time of the year) to a solar hijri year. A short table of year correspondences between the Persian and Gregorian calendars is provided below.

Tehran Province

Tehran Province (Persian: استان تهران Ostān-e Tehrān‎‎) is one of the 31 provinces of Iran. It covers on area of 18,909 square kilometres (7,301 sq mi) and is located to the north of the central plateau of Iran.

The province was put as part of First Region with its secretariat located in its capital city, Tehran, upon the division of the provinces into 5 regions solely for coordination and development purposes on June 22, 2014.

Tehran Province borders Māzandarān Province in the north, Qom Province in the south, Semnān Province in the east, and Alborz Province in the west. The metropolis of Tehran is the capital city of the province and of Iran. As of June 2005, this province includes 13 townships, 43 municipalities, and 1358 villages.

Tehran Province is the richest province of Iran as it contributes approximately 29% of the country's GDP. Furthermore, it houses approximately 18% of the country's population. Tehran Province is the most industrialized province in Iran; 86.5% of its population resides in urban areas and 13.5% of its population resides in rural areas.

Organic food

Organic foods are foods produced by organic farming. While the standards differ worldwide, organic farming in general features cultural, biological, and mechanical practices that foster cycling of resources, promote ecological balance, and conserve biodiversity. Synthetic pesticides and chemical fertilizers are not allowed, although certain approved pesticides may be used. In general, organic foods are also not processed using irradiation, industrial solvents, or synthetic food additives.

Currently, the European Union, the United States, Canada, Mexico, Japan and many other countries require producers to obtain special certification in order to market food as organic within their borders. In the context of these regulations, organic food is food produced in a way that complies with organic standards set by national governments and international organizations. Although the produce of kitchen gardens may be organic, selling food with the organic label is regulated by governmental food safety authorities, such as the US Department of Agriculture (USDA) or European Commission.