A period of twelve months, especially as measured from January 1 to December 31.

एक वर्ष

English Usage: This year has been challenging for everyone.

Hindi Usage: इस वर्ष सभी के लिए चुनौतीपूर्ण रहा है।

Exactly, at a specific point in time (commonly used in phrases like "year dot").

सही समय पर

English Usage: They started their journey from year dot.

Hindi Usage: उन्होंने वर्ष की शुरुआत से अपनी यात्रा शुरू की।