Same can't really said about someone from 1955 and 1975, 1980 - 2000, etc.
edit: Score 4695 Avg. Years Off 3.0
Considered over a longer timescale, up through the late 19th century, the principle options for clothing were cotton, flax, silk, wool, leather, grasses (in some regions), and metal, with very few other options.
Viscose rayon was the first synthetic fibre created, in 1899. It was followed by Nylon (1930s) which pressaged a slew of additional synthetics, notably polyester. Adoption was somewhat slowed by various factors, including WWII, but by the 1960s synthetic fabrics and brilliant dyes were exploding into popularity.
Flagrant use of synthetics faded somewhat through the 1970s and 1980s, with fabric blends and natural fabrics becoming more prevalent (yes, I'm aware that the leisure suit was prominent in the 1970s, but it was less so by the end of the decade).
There've been variations in specific styles since, though most to my eye have been evocative of earlier 20th-century periods since the 1990s, rather than distinctively original. (I'm far from an expert in clothing fashion, take with heaping handfuls of salt.)
Other scene-setting elements include architectural styles (notably houses in the West), automobiles, and since ~2000, the presence and style of handheld mobile devices, smartphones after about 2010. Camera styles would be a useful indicator for much of the 1900s ("Brownie" box cameras, SLRs, "Instamatics", and the like).