XXXIV

XXXIV is the Roman numeral for the number 34. It is composed of XXX (30) and IV (4). As with other Roman numerals, XXXIV is used in contexts where numerical labels or dates are written in classical style, such as inscriptions, clock faces, and lists.

In mathematics, 34 is an even composite number, equal to 2 × 17. It is a semiprime, since it is the product of two primes. 34 is also a Fibonacci number, appearing in the sequence 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...

Historically, XXXIV can designate the 34th year within a given era, such as 34 CE or 34 BCE, or the 34th year of a ruler’s reign. Roman numerals are often used in regnal lists, monuments, and other formal designations to mark ordinal positions or years.

In modern usage, XXXIV is commonly used to denote the 34th edition of competitions or events. For example, the 34th Olympiad corresponds to the 2028 Summer Games in Los Angeles. The numeral also appears in various catalogs, editions, and series that adopt Roman numerals to indicate sequence or chronology.