Carol Richardson of London Tuesday said British married couples are happiest 11 months and eight days after their wedding, the Web site that conducted the research, confetti.co.uk, said.
''We've found the secret to the happiest time together isn't about big, expensive and lavish gifts but being there for each other to share special moments," Richardson said.
Married adults enjoy their best sex, romantic meals and nights out with friends after two years and four months.
Successful couples spend 24 minutes a day having a "heart-to-heart each evening" and never go to bed after an unresolved argument, the Web site said.
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