Sandbox

From Freebase

The Freebase Sandbox (sandbox-freebase.com) is a copy of Freebase that is refreshed every Sunday afternoon. Developers can load data to the Sandbox for testing before loading to Freebase proper. It also tends to run a newer version of the Freebase software platform.

The data on Freebase is copied over to Sandbox once a week beginning at 0000 UTC on Monday (ie Sunday afternoon Pacific time). At this time, any accounts that have been added to Freebase in the previous week will also be copied over - and the same login information that works on Freebase will subsequently work on Sandbox.

Edits are wiped away on Sunday!

This also means that any data that you have loaded to Sandbox will be overwritten at this time. This is done so that people can experiment with a recent copy of the Freebase data set. It also provides some freedom if people submit damaging changes or changes they don't intend to keep, this is all cleaned up automatically for them.

In the future, we plan to have utilities that will allow you to mark selected content for preservation. In the meantime, if you are creating types that you'd like to retain, we recommend creating them in your private domain on Freebase, not on Sandbox.

If you need to know exact timing of the refresh, you can subscribe to Release@freebase.com [1]