Czech Republic–Slovakia relations
Before 1918, both countries were part of Austria–Hungary. However, after the Ausgleich of 1867 Czechia belonged to the Austrian Empire while Slovakia belonged to the administratively separate Kingdom of Hungary, and between 1918 and December 31, 1992, both countries were part of Czechoslovakia. 
Both countries established diplomatic relations on January 1, 1993. These international relations are usually referred to or described as "very good", "cordial", and "above standard" in the media. When a Czech or Slovak president is inaugurated, very often his first international visit is to the former part of the common country. The same custom applies to newly elected prime ministers of the Czech Republic and Slovakia.
Dissolution of Czechoslovakia
Public perception of the dissolution has not changed much, with a December 2017 poll showing that just 42% of Czechs and 40% of Slovaks agree with what happened (compared to 36% and 37% in 1992, respectively). According to Czech political analyst Lubomir Kopeček, many Czechs and Slovaks view the breakup process unfavourably because they had no say in the matter. Most people would have rather had a referendum decide. In 2015, a Slovak movement called "Czechoslovakia 2018" was established to try to get a referendum by 2018. While its leader, Ladislav Zelinka, said he received thousands of emails and calls from supporters, it was unable to reach the necessary 350,000 petition signatures. The younger generations of both countries are largely indifferent to the issue, never having experienced the previous period themselves, while older generations are more focused on present issues such as immigration while also favouring their own separate nationalism.