The initial instance of something happening.

किसी चीज़ का आरंभिक उदाहरण।

English Usage: "The first time I traveled abroad was unforgettable."

Hindi Usage: "पहली बार जब मैं विदेश गया तब वह अविस्मरणीय था।"

For the first instance or occurrence of an event

पहली बार

English Usage: She traveled abroad for the first time.

Hindi Usage: वह पहली बार विदेश यात्रा पर गई।