Afternoon

The afternoon starts after noon.

The sun moves down from the top of the sky. It moves toward the west.

This is when many people finish school. It is also a time when plants make food. The sun is very bright in the late afternoon.

Some people feel less awake during this time. Many people go home from work too. It is a busy part of the day.

The afternoon is the time between noon and sunset.

During this time, the sun moves down from its peak. It travels from the center of the sky toward the west. In the late afternoon, the light can be very bright. This happens because the sun is at a low angle.

Many things change during the afternoon. Plants use sunlight to make food. This is called photosynthesis. Plants like maize do this a lot. This can change the amount of carbon dioxide in the air. In humans, body temperature is often highest in the late afternoon.

Some people feel less alert during this time. For example, drivers might have more accidents in the early afternoon. Studies show people may react slower to traffic signs at 3:00 pm.

Work and school often end during the afternoon. Many people travel home during the rush hour. This makes the afternoon a very busy part of the day.

The afternoon is the time between noon and sunset.

It begins when the sun starts descending from its highest point. The sun moves from the center of the sky toward the west. In the late afternoon, the light becomes very bright and glaring. This happens because the sun sits at a low angle.

For many people, this is the second half of the work day. In Denmark, people define the afternoon as the time from 1:00 pm to 5:00 pm.

Many living things change how they act during these hours. Plants have their highest levels of photosynthesis in the early afternoon. Photosynthesis is how plants use sunlight to make food. Large maize crops can even change the amount of carbon dioxide in the air. This happens because they use so much carbon dioxide during the day. These levels drop sharply once the afternoon turns into evening.

In animals, a hormone called cortisol is often very stable. Cortisol helps with things like blood sugar and stress. Scientists find this time of day very useful for studying these levels.

Humans also experience changes in their bodies during the afternoon. Most people find their body temperature is highest in the late afternoon. Because of the sun's bright glare, farmers must plan carefully. They often build animal houses running east to west. This allows for thicker walls to block the intense afternoon sun. If animals get too hot, they can become restless or unproductive. This shows how the sun's position affects life on Earth.

Sometimes, people feel less alert as the afternoon goes on. A study in Sweden looked at car accidents from 1987 to 1991. They found that 5:00 pm had the most accidents. There were about 1,600 accidents at that time. This was much higher than the 1,000 accidents seen at 4:00 pm or 6:00 pm.

In Finland, farm accidents are most common on Monday afternoons in September. These patterns might happen because of the afternoon rush hour.

Productivity also tends to dip during these hours. One study in the 1950s looked at two factory workers. It found their work was 13 percent lower in the afternoon. The least productive time was their very last hour of work. Not everyone follows the same daily rhythm, though. Some people are "morning types" and others are "evening types." However, most people show high alertness between 2:00 pm and 8:00 pm.

The afternoon is the period of time between noon and sunset or evening. It begins when the sun starts descending from its peak in the sky. The sun moves from the center of the sky toward the west. In the late afternoon, the light becomes particularly bright and glaring. This happens because the sun sits at a low angle in the sky.

This time of day is important for human schedules and natural cycles. In many industrialized nations, the afternoon represents the second half of the workday. For example, a standard shift from 9:00 am to 5:00 pm includes the afternoon. In Denmark, the afternoon is specifically defined as the time between 1:00 pm and 5:00 pm.

Biological processes change significantly during these hours. In diurnal animals, the hormone cortisol often reaches a stable state. Cortisol is a hormone that aids metabolism and increases blood sugar. It is also produced when an animal responds to stress. Because cortisol levels are stable but reactive to the environment, researchers find the afternoon optimal for studying stress.

Plants also show distinct patterns during this time. Most plants reach their highest levels of photosynthesis in the early afternoon. Photosynthesis is the process where plants use sunlight to create food. This process is so widespread in maize crops that it causes small fluctuations in atmospheric carbon dioxide. These levels drop sharply during the late afternoon and evening.

Human body temperatures also follow a daily pattern. For most people, body temperature is typically highest during the mid to late afternoon. This change can affect how we manage living things like livestock. Factory farm owners are often advised to orient buildings from east to west. This orientation allows for thicker walls on the east and west sides. These walls help block the intense glare and acute angle of the late afternoon sun. If animals become too hot from this sunlight, they may become belligerent or unproductive.

Cognitive alertness and safety can also shift as the sun descends. Many studies suggest a dip in human productivity and alertness during the afternoon. For instance, motor vehicle accidents often occur more frequently in the early afternoon. This may happen because drivers have recently finished lunch. In Sweden, a study from 1987 to 1991 looked at accident data. They found that 5:00 pm had the highest number of accidents at approximately 1,600. This was significantly higher than the 1,000 accidents recorded at both 4:00 pm and 6:00 pm.

In Finland, agricultural accidents are most common on Monday afternoons in September.

Workplace productivity often shows a measurable decline during these hours. In a 1950s study, researchers observed two female factory workers for six months. They found that productivity was 13 percent lower in the afternoon. The workers were least productive during their final hour of the shift. This decline was attributed to personal breaks and unproductive activities. Larger studies have also noted that these afternoon declines are more significant during longer work shifts. Power plants have also seen significant reductions in productivity during the afternoon compared to the morning. These differences are usually smallest on Mondays and largest on Saturdays.

Reaction times and test performance are also linked to this time of day. Four studies conducted in 1997 tested how people differentiate traffic signs. The subjects had longer reaction times at 3:00 pm and 6:00 pm than at 9:00 am or 12:00 pm. These results applied to both complex and abstract questions. However, not all research shows these same trends. One researcher in the UK studied 300,000 A-level exam papers. That researcher found no difference in performance between morning and afternoon exams. This suggests that individual biology may play a role in how we process information.

Circadian rhythms, or internal biological clocks, vary from person to person. A study in Italy and Spain used a "morningness–eveningness" scale to rank students. The results followed a standard bell curve. While "morning types" and "evening types" have different peak hours, most people share a common window. Most participants showed high levels of alertness between 2:00 pm and 8:00 pm. Outside of this specific window, alertness levels matched their individual scores on the scale. Understanding these rhythms helps us see how the afternoon affects different people in different ways.