The way it works is:
Each week's contest begins on Sunday and ends on Friday so week 54 just started yesterday and will continue until this Friday.
The winners are announced on Monday following the end of the contest on Friday so week 53 winners are announced today and week 54 will be announced next Monday.
For more on the rules read What Are The Rules To Enter Steemit Open Mic And Why Do We Have Rules Anyways --- by @luzcypher