Why some star can be seen in a a month but not in other month?

Some stars are visible during certain months due to the Earth's orbit around the Sun. As the Earth moves, the night sky changes, causing different constellations and stars to rise and set at different times of the year. Additionally, seasonal changes in the Earth's tilt affect which stars are above the horizon during the night. This is why certain stars are prominent in winter but may not be visible in summer.