invalid date when adding product with custom options(datetime) using REST API

Question

1. I have a product with a custom option DateTime filed in product options Screenshot from 2020年10月07日 16-59-54
2. When I try to place an order using rest API. My order array is given below

$order = array (
 'cartItem' => 
 array (
 'sku' => $product_sku,
 'qty' => 1,
 'quote_id' => $cart_id,
 'product_option' => 
 array (
 'extension_attributes' => 
 array (
 'custom_options' => 
 array (
 0 => 
 array (
 'option_id' => '1',
 'option_value' => '2020-10-15 13:00:00',
 )
 ),
 ),
 ),
 ),
);

3. My cart response is given below

"{"item_id":4,"sku":"Jessica Pant","qty":1,"name":"Jessica Pant","price":169,"product_type":"simple","quote_id":"3","product_option":{"extension_attributes":{"custom_options":[{"option_id":"1","option_value":"2020年10月16日 01:00:00"}]}}}"

4. As you can see i have set custom option value(datetime) as '2020年10月15日 13:00:00' in code. But after execute add to cart API code. the date changed to "2020年10月16日 01:00:00"

Expected result (*)

"{"item_id":4,"sku":"Jessica Pant","qty":1,"name":"Jessica Pant","price":169,"product_type":"simple","quote_id":"3","product_option":{"extension_attributes":{"custom_options":[{"option_id":"1","option_value":"2020年10月15日 13:00:00"}]}}}"

Actual result (*)

"{"item_id":4,"sku":"Jessica Pant","qty":1,"name":"Jessica Pant","price":169,"product_type":"simple","quote_id":"3","product_option":{"extension_attributes":{"custom_options":[{"option_id":"1","option_value":"2020年10月16日 01:00:00"}]}}}"

My Magento ver. 2.3.4-p2

Answer 1

Finally, I have figured out the issue. Actually, it was not a core issue of magento2. The issue was related to a settings in catalog congiuration

stores > config > catalog > catalog > Date & Time Custom Options

My setting was 12h AM/PM

I changed it to 24h

Hope it will help someone :)