The issue of the impact of the pandemic on the economy is still relevant, especially in time after the peak of its second wave. Entities on both the supply and demand sides of the market had to adapt to highly non-standard market conditions in a relatively short time. Closing the economy, combined with social distancing, was supposed to slow the spread of the pandemic. The question of how successful this effort has been can only be answered over time. In any case, the consequences of a lockdown in the form of changes in common patterns of behavior can be monitored almost immediately. The aim of the presented study is to examine selected characteristics of consumer behavior of Slovaks during a pandemic compared to the reference pre-pandemic period. During the first lockdown in 2020, the B2C interactions of the five largest Slovak e-shops and their customers in the environment of the social network Facebook were monitored on a daily basis. The results suggest that customer interactions have shifted over time during the current day, while the interactions of content producers have remained unchanged. In order to remain effective in spending resources on promotion, companies will need to better reflect changes in customer behavior patterns in the future. At the same time, it is necessary to monitor how the identified trends will create new standards.