Hi @ch1n3s3b0y
The date picker in ACF does not support time at all so I’m assuming you’re using a custom third party addon for that. Possibly this: https://wordpress.org/plugins/acf-field-date-time-picker/ ?
If so I suggest you post your question in that support forum instead since we can’t provide help for third party solutions 🙂
There are talk of adding a datetime field in ACF core at some point but we’re not there yet.