Date saving doesn’t work

I activated debug plugin so i have other informations.
I’m trying to modify field data_di_nascita.
After activating plugin I wrote
23 aprile 1985
and in log file i read
UPDATE wp_participants_database SET date_updated = NOW(),……, email = ”, data_di_nascita = ‘483044400’, luogo_di_nascita = ‘LoretoXXXXX___(AN)’,…..
but in Unix Time 483044400 = 22 aprile 1985 and not 23 aprile 1985

Then I tried again and i wrote
25 maggio 1985
and in log file i read
UPDATE wp_participants_database SET date_updated = NOW(),……., email = ”, luogo_di_nascita = ‘LoretoXXXXX___(AN)’,…….
but in UPDATE query my field data_di_nascita is missing!

I suppose that there is some problem when plugin generates update string.

Here is the complete log
Log file initiated at: 22 January 2019 14:32 UTC
[01/22/19 2:32pm UTC]
PDb_List_Admin::initialize
list query: SELECT * FROM wp_participants_database p ORDER BY p.last_name asc
[01/22/19 2:33pm UTC]
Participants_Db::process_form storing record: UPDATE wp_participants_database SET date_updated = NOW(), last_name = ‘Acquaroli’, first_name = ‘Miriam’, address = ‘Via Buonarroti, 12’, city = ‘Montecosaro(MC)’, zip = ‘62010’, phone = ”, phone2 = ”, email = ”, data_di_nascita = ‘483044400’, luogo_di_nascita = ‘LoretoXXXXX___(AN)’, state = ”, country = ”, mailing_list = ‘Yes’, dummy = ”, guida_tessera = ‘Giovanni’, anno_validita = ‘2019’, dafare_tessera = ‘no’, note = ‘Si’, note2 = ”, approved = ‘no’, photo = ”, website = ”, interests = ” WHERE id = 768
[01/22/19 2:33pm UTC]
PDb_List_Admin::initialize
list query: SELECT * FROM wp_participants_database p ORDER BY p.last_name asc
[01/22/19 2:35pm UTC]
PDb_List_Admin::initialize
list query: SELECT * FROM wp_participants_database p ORDER BY p.last_name asc
[01/22/19 2:35pm UTC]
Participants_Db::process_form storing record: UPDATE wp_participants_database SET date_updated = NOW(), last_name = ‘Acquaroli’, first_name = ‘Miriam’, address = ‘Via Buonarroti, 12’, city = ‘Montecosaro(MC)’, zip = ‘62010’, phone = ”, phone2 = ”, email = ”, luogo_di_nascita = ‘LoretoXXXXX___(AN)’, state = ”, country = ”, mailing_list = ‘Yes’, dummy = ”, guida_tessera = ‘Giovanni’, anno_validita = ‘2019’, dafare_tessera = ‘no’, note = ‘Si’, note2 = ”, approved = ‘no’, photo = ”, website = ”, interests = ” WHERE id = 768

I have unchecked the “Sync php Timezone” setting but nothing is changed.

I read your document about this kind of issue
https://xnau.com/date-shifting-and-other-timezone-related-issues-in-participants-database/
and i have contacted my web host to verify PHP timezone and to make sure that that setting is active in all directories.

They told me that all settings are ok. They put in my root a php test page where you can verify php settings
http://www.camminandomontievalli.it/test.php

They were very helpful. They told that if you specify the plugin’s part of saving the dates, they will do other checks directly on your plugin

The date format is j F Y both in wordpress settings and in your plugin settings and it is correct.
I noticed that if i change the day but not the month the date is saved one day before.
If i change the month the date is not saved at all.

If you can’t give me more help, could you specify the plugin’s part of saving the dates? My web host will debug the problem.
Thanks

This issue is fixed!
You were right: there was a problem in host server settings.
My web host said that the settings were all correct but the plugin did not work. So they tried to move all my site to a different server and now everything works.
Unlucky we did not understand what was the wrong setting but the important thing is that your plugin works properly now.

Thank you