The water level in a Bain-Marie should be filled to about halfway up the sides of the inner cooking container. This allows for gentle and even heating of the food without the risk of the water boiling over and into the food. It's important to monitor the water level during cooking to ensure it doesn't evaporate completely and cause the Bain-Marie to overheat. **

The tradition of playing April Fool's jokes is typically only observed on April 1st. However, some people may extend the celebration throughout the entire month of April, especially in countries where the tradition is particularly popular. Ultimately, the decision to continue the jokes beyond April 1st is up to individual preference and cultural norms. **

In many regions, 30 degrees Celsius is considered to be above average for April. April temperatures typically range from 10 to 20 degrees Celsius in many parts of the world. Therefore, experiencing 30 degrees Celsius on April 28, 2012, would be considered unusually warm for that time of year. **

As an AI language model, I don't have personal preferences or feelings, so I don't have the capacity to like or dislike anything, including the month of April. However, I can provide information and assistance related to April or any other topic you'd like to discuss. **

April 1st is known as April Fools' Day, a day when people play practical jokes and hoaxes on each other. It is a day filled with humor and light-hearted pranks, where people try to trick their friends and family with funny or silly tricks. It is celebrated in many countries around the world, and the origins of the day are not entirely clear, but it is believed to have started in the 16th century in France. **

In April, many flowers and trees begin to bloom. Some common flowers that bloom in April include tulips, daffodils, cherry blossoms, and magnolias. Trees such as dogwoods, redbuds, and crabapples also bloom in April, adding bursts of color to the landscape. Additionally, many spring-blooming bulbs like hyacinths and crocuses also come into bloom during this time. **

April Fools' jokes are pranks or hoaxes that are played on people on April 1st, known as April Fools' Day. These jokes are meant to be light-hearted and fun, with the intention of tricking someone into believing something that is not true. People often play practical jokes on friends, family, or coworkers, and then reveal the truth by saying "April Fools!" to show that it was all in good fun. **

In April 1961, the United States launched the Bay of Pigs invasion, an unsuccessful attempt to overthrow the Cuban government led by Fidel Castro. The invasion was carried out by Cuban exiles with the support of the U.S. government, but it was quickly defeated by Cuban forces. The failure of the invasion was a major embarrassment for the U.S. and strained relations between the two countries. This event also had significant implications for the Cold War and the ongoing tensions between the U.S. and the Soviet Union. **