What time is free data on Hughesnet?

Can you please clarify for me the specific time when Hughesnet offers free data services? I understand that they may have promotional offers or certain plans that include a limited amount of free data, but I'm unsure about the exact timing of when this free data is available. Is it during certain hours of the day? Or is it a one-time allocation that's provided with a new subscription or plan? I'd appreciate any information you can provide to help me better understand the availability of free data on Hughesnet.