Common:REST Date Time Display Types

An additional <display> property can also be specified for custom fields in Custom Objects, with the values:

• as_entered - Store and display the value as entered.
• convert - Convert the value between time zones.

For example:

String postXml =  "<platform>
    <field>
        ...
        <display>as_entered</display>
    </field>
</platform>

Learn more: Date/Time Display Types