The presence of the seasonal or monthly effect in stock returns has been reported in several developed and emerging stock markets. This study investigates the existence of seasonality in India's stock market, primarily trying to detect the "Day of the Week Effect" in the Stocks listed on the National Stock Exchange. It covers the post-reform period. The study uses the Daily return data of the stocks listed on National Stock Exchange and Bombay Stock Exchange Index for the period from November 1994 to September 2007 for analysis. After examining the stationarity of the return series, by applying "Kruskal Wallis" test and "One Way Anova" i.e. using both Parametric and Non Parametric Tests, we specify an Augmented Dummy Regressive model to find the Day of the week effect monthly effect in stock returns in India. Another feature of our study was that we analysed the day of the week effect in three different phases of market ie. "Consolidation" Phase, "Bearish" Phase and the "Bullish" Phase. This was carried with an intention to see whether the day of the week effect was visible in these specific market phases or not. The results confirm the existence of seasonality (in the form of Day of the Week Effect) stock returns in India for 66 Stocks spanning across various sectors that we analysed - The results of the study imply that the stock market in India is inefficient, and hence, investors can time their share investments to improve returns and make abnormal profits. However the Day of the Week effect was found to be absent in the Bullish as well as the Bearish phase, which was a departure from our previous belief of the existence of this effect in all phases of the market.