Which definite article (el, la)? 2

Definite articles with days, dates, and times — Days of the week take the definite article when used with a specific event: El examen es el miércoles. For recurring events use the plural: Los sábados voy al gimnasio. But after ser stating the current day, no article: Hoy es miércoles. For months and seasons, en is used without an article: en enero, en verano.

Definite article with languages — After hablar, the article is optional and often omitted: Habla español or Habla el español. After estudiar, aprender, saber the article is almost always absent: Estudio francés. Sabe inglés. After en, no article: Lo dijo en inglés.

Definite article replacing a possessive — Spanish uses the definite article where English uses a possessive adjective, when the owner is obvious from context: Me lavé las manos (I washed my hands). Le dolía la cabeza (Her head was hurting). The dative pronoun (me, le) already indicates the owner — the possessive adjective would be redundant.