Does until 26th August mean including the 26th - or not?? Tate Modern question...

[loveyouradvice]

There is a rather wonderful sounding paint the walls in the turbine hall which is described as "20 July - 26 August" and "until 26 August".

Would you take this to mean that Monday 26 August is the last day? Which I am guessing it is.... or that it finishes on 25th?

26th August is the last day, not 25th.

thank you @RogueFemale