Introduction

Each broker publishes on his website the CFD expiration dates.
Taking here the example with FXCM

Description

IMPORTANT NOTES REGARDING EXPIRATIONS

Open positions on the ‘FXCM Expiration’ date will be closed during market break at our bid/offer price from market close at approximately 17:00 EST.
All pending Entry orders and Stop/Limit orders that are associated with the expiring contract will be cancelled..
When a contract expires any floating P/L at the time will be realized.
Expiration price is taken from 15 minutes earlier on Fridays as market close is at approximately 16:45 EST.
Bund Expiration price is always taken from one hour earlier as market close for BUND is at approximately 16:00 EST Daily.

URL

2020 FXCM CFD expiration contract dates