Christians in the UAE typically attend church on Friday, which is the Muslim day of worship as well. The weekend starts Friday and ends Saturday. Sunday is a work day. So instead of "Thank God, It's Friday", it's "Thank God, It's Thursday" here.
UCCD is located in a compound of Christian churches in Jebel Ali. The UAE government granted this compound for Christian churches to be built, so there are Catholic, Anglican, Orthodox, and Evangelical centers, each containing several worship halls that schedule multiple services by multiple churches.