Visa valid "until"

[i_m_in]

it is written on my visa that it is "valid until x date". So, will it become invalid on x date or will it become invalid on the day after x date? Thanks

[Lucapooka]

Your leave expires at midnight (23:59:59) on the date printed on the visa.

[vinny]

ECB9.4 Validity of entry clearance

[i_m_in]

Your leave expires at midnight (23:59:59) on the date printed on the visa.

thanks. The confusion is caused because it mentions "valid until x date".. it uses the word until, not till. So, just to confirm, if my visa says that visa is "valid until 14 Feb", then does my leave expire at midnight (23:59:59) of 14 Feb, or does it expire at midnight (23:59:59) of 13 Feb?

[John]

It is valid until "midnight (23:59:59) of 14 Feb".