Chief Justice David Maraga has allowed judges with urgent petitions related to Thursday's presidential election to hear them on Wednesday.
Acting Interior CS Fred Matiang'i declared Wednesday a public holiday, meaning courts and other public offices will be closed.
But Maraga said judges of the Constitutional and Judicial Review Division are free to preside over cases affecting the fresh election.
"The presiding judges have informed me they have matters related to the presidential elections...which they had scheduled to dispose off on October 25," he said in a letter to the High Court principal judge.
"The judges of the two...divisions have my authority to sit on October 25 to dispose of those matters.
He copied Deputy Chief Justice Philomena Mwilu and all affected judges.