'/(?<!%)a/' => '%p', // Lowercase Ante meridiem and Post meridiem => MySQL provides only uppercase
'/(?<!%)A/' => '%p', // Uppercase Ante meridiem and Post meridiem
'/(?<!%)d/' => '%d', // Day of the month, 2 digits with leading zeros
'/(?<!%)D/' => '%a', // A textual representation of a day, three letters
'/(?<!%)F/' => '%M', // A full textual representation of a month, such as January or March
'/(?<!%)g/' => '%l', // 12-hour format of an hour without leading zeros
'/(?<!%)G/' => '%k', // 24-hour format of an hour without leading zeros
'/(?<!%)h/' => '%h', // 12-hour format of an hour with leading zeros
'/(?<!%)H/' => '%H', // 24-hour format of an hour with leading zeros
'/(?<!%)i/' => '%i', // Minutes with leading zeros
'/(?<!%)I/' => 'N/A', // Whether or not the date is in daylights savings time
'/(?<!%)S/' => 'N/A', // English ordinal suffix for the day of the month, 2 characters, see below
'/jS/' => '%D', // MySQL can't return separate suffix, but could return date with suffix
'/(?<!%)j/' => '%e', // Day of the month without leading zeros
'/(?<!%)l/' => '%W', // A full textual representation of the day of the week
'/(?<!%)L/' => 'N/A', // Whether it's a leap year
'/(?<!%)m/' => '%m', // Numeric representation of a month, with leading zeros
'/(?<!%)M/' => '%b', // A short textual representation of a month, three letters
'/(?<!%)n/' => '%c', // Numeric representation of a month, without leading zeros
'/(?<!%)O/' => 'N/A', // Difference to Greenwich time (GMT) in hours
'/(?<!%)r/' => 'N/A', // RFC 2822 formatted date
'/(?<!%)s/' => '%s', // Seconds, with leading zeros
// S and jS moved before j - see above
'/(?<!%)t/' => 'N/A', // Number of days in the given month
'/(?<!%)T/' => 'N/A', // Timezone setting of this machine
'/(?<!%)U/' => 'N/A', // Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
'/(?<!%)w/' => '%w', // Numeric representation of the day of the week
'/(?<!%)W/' => '%v', // ISO-8601 week number of year, weeks starting on Monday (added in PHP 4.1.0)
'/(?<!%)Y/' => '%Y', // A full numeric representation of a year, 4 digits
'/(?<!%)y/' => '%y', // A two digit representation of a year
'/(?<!%)z/' => 'N/A', // The day of the year (starting from 0) => MySQL starts from 1
'/(?<!%)Z/' => 'N/A', // Timezone offset in seconds. The offset for timezones west of UTC is always negative, and for those east of UTC is always positive.