If someone buy Lifetime on payments.php it shows Lifetime too expire date?

No it will show how ever long you set it for, so if you set your lifetime at 99 Years, that is what it will show.

Hmm maximal is 20 Years how i can change it to 99999 again with this method? Replace the Variable 20 to 9999?

Are you sure 20 is the max, I set mine to 987564 Years, then you can use the replacement variable on that number.

The length of the subscription you entered is invalid. The length must be a positive value which will result in a date less than 2037.

How i can do it with expire date with Lifetime.

What version of vB are you running?

vBulletin 4.2.1

--------------- Added [DATE]1379968714[/DATE] at [TIME]1379968714[/TIME] ---------------

I think it would be easier for me if i could find a special character which represents the same as the * does (unlimited characters), so i could replace all the dates which ends with the same year : like: 09-10-2017, *2017 with Lifetime. Is there such a character in vbulletin?

That is strange, here is how I set mine up and it saves without that message.

https://vborg.vbsupport.ru/external/2013/09/25.png

I think it would be easier for me if i could find a special character which represents the same as the * does (unlimited characters), so i could replace all the dates which ends with the same year : like: 09-10-2017, *2017 with Lifetime. Is there such a character in vbulletin?

Not that I am aware of.