Numerous studies investigated patters in daily stocks returns, considering many possible manifestations, like the day-of-the-week (DOW) and turn-of-the-month (TOM)effects. This study analyses the possibility that they represent the same effect, but have been described as different patterns due to the methodologies employed. The results show that both effects are present on the Romanian market. However, a profitable DOW effect is linked to the existence of the TOM effect, while the TOM effect seems to be able to also create positive returns in an individual manner. Thus, investors should base their strategies mainly on the TOM effect.