Nightfall Preview Event when?

Just a quickie, i apologise if im being thick.

On the Guildwiki front age, it ways the event is the 28th till the 30th of July, but on Guru's it says 21st till the 23rd

I can check on GW's start page atm, as im at work, so i'd be grateful if anyone could help me out

TIA

Wiki: 28th-30th
Guru: 28th-30th
Main page: 28th-30th

If you read Guru's page, the title says the Nightfall event starts the 28th. The red text that you infered to be relating to Nightfall is actually referring to this weekend's double Balthazar Faction event.

Thanks for clearing that up for me