Decade when ZIP codes were introduced

• "Flower Power" era
• Number of fashion items in Mary Quant's era
• Era of liberalization
• Great Society era, with "the"
• Hippie decade
• Hippie era, with 'The'
• "The Help" era, with "The"

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Sixty \Six"ty\, n.; pl. Sixties . The sum of six times ten; sixty units or objects. A symbol representing sixty units, as 60, lx., or LX.

WordNet Word definitions in WordNet
n. the decade from 1960 to 1969 [syn: 1960s ] the time of life between 60 and 70 [syn: mid-sixties ]