Nearly two million people are expected to crowd Barcelona's streets on Monday for Catalonia's national day, known as the (Diada).
A Spanish high court last Friday decided to suspend the October 1 vote on the province's independence pending a decision on its constitutionality.

This year, the national day celebration bears a special name: la Diada del Si, Catalan for the National Day of Yes.
The Yes is a rallying cry in the vote for independence. 
The Catalan government's ruling coalition, Junts pel Si, or Together for Yes, is a joining of parties from across the political spectrum to achieve this end.
The majority of municipalities in the northeastern region are prepared to facilitate the vote, in spite of Madrid's threats to prosecute any mayor who goes ahead with polling.
Pique confessed he was against independence until a few years ago, as was the majority of Catalan voters.
He explained that many Catalan "don't feel welcome in the Spanish state" after years of unfair economic relations and recent political measures against the headstrong region.
Talks regarding financial agreements stalled in 2012. Catalonia's then-President Artur Mas aimed to create a new "fiscal pact" that would have more evenly distributed tax income between the regional and federal governments.
Catalonia's gross product was 223bn euros in 2016, the highest in Spain, and it shares a border with France and Barcelona is home to Spain's most financially successful port.
Mas told CNN in 2012 that "if you compare the money we send to Madrid every year and the money we get back from Madrid, there is a difference - a near difference of $20bn".
Pique confirmed that fiscal relations have not improved.
Furthermore, Catalonia is still recovering after the violent attacks committed by ISIL-linked attackers between August 16 and 17 that left 14 people dead, the majority of whom were killed in downtown Barcelona.
Pique said the Spanish authorities "have mixed the independentist process with the attacks".
The Catalan police were blocked from the Interpol database by the Spanish government, Pique said, which left security forces without valuable information regarding the cell that planned the attack.
"It's the Spanish government playing politics with security," which risked the safety of secessionists, unionists and "everyone who visits [Barcelona]," the press secretary commented. 
He also said that it is not only the Spanish government playing politics with the attacks, but also pro-union media.
el Periodico, a centre-left Catalan newspaper viewed as a pro-Madrid, published a document at the end of August, originally thought to be correspondence from the United States' Central Intelligence Agency to Barcelona's police, warning them of possible attacks on May 25.